- Research article
- Open Access
- Open Peer Review
Awareness of risk factors for cancer: a comparative study of Sweden and Denmark
© Lagerlund et al. 2015
- Received: 23 April 2015
- Accepted: 17 November 2015
- Published: 23 November 2015
Sweden and Denmark are neighbouring countries with similarities in culture, healthcare, and economics, yet notable differences in cancer statistics. A crucial component of primary prevention is high awareness of risk factors in the general public. We aimed to determine and compare awareness of risk factors for cancer between a Danish and a Swedish population sample, and to examine whether there are differences in awareness across age groups.
Data derive from Module 2 of the International Cancer Benchmarking Partnership. Telephone interviews were conducted with 3000 adults in Denmark and 3070 in Sweden using the Awareness and Beliefs about Cancer measure. Data reported here relate to awareness of 13 prompted risk factors for cancer. Prevalence ratios with 95 % confidence intervals were calculated to examine associations between country, age, and awareness of risk factors.
Over 90 % of respondents in both countries recognized smoking, use of sunbeds and ionizing radiation as risk factors for cancer. Lowest awareness (<50 %) was found for HPV-infection, low fruit and vegetable intake and alcohol intake. Swedish respondents reported higher awareness than Danish respondents for ten of the 13 risk factors studied. Respondents from Denmark reported higher awareness only regarding low fruit and vegetable intake and use of sunbeds. Low physical activity was the only risk factor for which there was no difference in awareness between the countries. A decline in awareness was generally seen with increasing age in both countries, but deviating patterns were seen for alcohol intake, red/processed meat, obesity and age 70+.
This study supports findings from other European studies that generally demonstrate modest public awareness of many established cancer risk factors. Efforts should be made to improve awareness of the cancer risk factors HPV-infection, low fruit and vegetable intake and alcohol intake, which showed particularly low awareness in both countries. Previous studies indicate that repeated, broad campaigns are successful, and suggest that a multimedia approach is used.
- Risk factors
Recent statistics show that cancer was the second most common cause of death in the European Union in 2011  and that important international differences exist in cancer survival . The International Cancer Benchmarking Partnership (ICBP) was initiated with the purpose of investigating international differences in cancer survival and their possible causes, and includes jurisdictions in Australia, Canada, Denmark, England, Northern Ireland, Norway, Sweden and Wales . In the second of five ICBP modules, cancer awareness and beliefs in the general population were investigated.
In the present study based on data from ICBP Module 2, we focus on Denmark and Sweden, two Nordic countries with many similarities in culture, healthcare systems, and economic status, but with variations in cancer statistics. World age-standardized mortality rates from cancer (all sites) in 2013 were considerably lower in Sweden (102 (male) and 84 (female) per 100 000) than in Denmark (138 (male) and 109 (female) per 100 000) . Denmark even had the highest estimated cancer incidence among 184 countries worldwide in 2012, while Sweden ranked 24 in incidence .
It is widely accepted that awareness is an important condition, although not sufficient on its own, for stimulating behavioural change. For some cancers, risk can be reduced through behavioural changes of modifiable cancer risk factors. Furthermore, in the case of both modifiable and non-modifiable factors, awareness might promote appropriate health-seeking behaviour. By addressing known modifiable risk factors it has been estimated that a third to half of all cancers in the developed world could be prevented, and that early diagnoses and effective treatments could cure another one third [6–8]. Assessing awareness of risk factors for cancer among the general public is thus an important step in identifying potential areas where awareness may need to be raised.
Awareness of cancer risk factors has not been extensively examined in Europe apart from a few UK [9–12] and multi-country studies [13, 14], with one previous multi-country study finding that adults in Denmark had lower awareness of colorectal cancer risk factors than adults in Sweden , although no explanation for this was presented. For many established risk factors for cancer, awareness levels have been found to be low [9, 10, 12, 14–16], but vary widely depending on what countries, cancer forms and risk factors were investigated, as well as study characteristics. Broad, updated, and context specific knowledge of awareness levels is needed to support planning and implementation of appropriate interventions.
Successful implementation of risk factor awareness campaigns may also be facilitated by knowledge of which subgroups of the population might benefit most from specific campaigns. An association between age and awareness of established risk factors for cancers has been indicated in some studies [9, 10, 15, 17, 18]; however no consistent age-related pattern emerges across different cancers and risk factors, and other studies find no effect of age [11, 19–21]. Even though people over age 70 are at highest risk of developing cancer it is important to also gauge information needs, raise awareness and encourage healthier lifestyles in younger people. Both Denmark and Sweden collected ICBP Module 2 data from ages 30 and older, enabling an investigation of awareness across a wide age span, to provide a basis for future public health initiatives.
The aim of this study is therefore to determine and compare awareness of a number of established risk factors for cancer between a Danish and a Swedish population sample, and to examine whether there is a difference in awareness of risk factors across age groups in Denmark and Sweden.
Study population and data collection
We used data collected through a telephone survey for the ICBP Module 2. The target sample size was 1000 respondents aged 30-49 years and 2000 respondents aged ≥50 years in each country. Using simple random sampling a total of 20,000 residents 30-49 years of age and 40,000 residents aged 50 and older were selected from the Danish Civil Registration System (CRS). In Sweden, a total of 8000 residents 30-49 years of age and 15,000 residents aged 50 and over were selected from the Swedish Population and Address Register (SPAR) for the Uppsala-Örebro and Stockholm-Gotland healthcare regions. Names and/or addresses as listed in the CRS and SPAR were supplemented with landline and/or mobile phone numbers by national market research and consulting firms (NN Markedsdata in Denmark and Infodata in Sweden). The survey was conducted from May 31 to July 4, 2011 in Denmark and from August 15 to September 30, 2011 in Sweden. Computer-assisted telephone interviews were carried out by trained native-speaking interviewers from the research company Ipsos MORI (for further details about the methodological procedures, see references [22, 23]).
Data collection process and survey response
Initial study base
Persons with research protection
Persons with no obtainable phone number
Eligible for being contacted
Total number of persons approached
Number of ineligible persons
Number of persons eligible
Number of persons who could not be contacted after seven attempts
Number of persons eligible and made contact to
Refused or did not complete the interview
Survey measure and study variables
Module 2 data was aimed to measure cancer awareness and beliefs in the general population using the Awareness and Beliefs about Cancer (ABC) instrument (for further information on instrument development and testing, please see references [22, 23]). This instrument consists of a core section covering questions on awareness and beliefs about cancer, and perceived barriers to healthcare seeking, and optional sections on awareness of risk factors for cancer and on cancer screening beliefs and behaviours. In addition, information about sociodemographic factors, smoking status, self-rated health and personal experience of cancer (self and/or other, if any) was collected.
The analyses reported here relate to awareness of the following 13 risk factors for cancer: smoking, second-hand smoke, drinking more than 1 unit of alcohol a day, low fruit and vegetable intake, red/processed meat, obesity, sunburn in childhood, being over 70 years of age, having a close relative with cancer, HPV-infection, low physical activity, use of sunbeds, and exposure to ionizing radiation. These questions constituted an optional survey component that both Sweden and Denmark included. Using a recognition method, the respondents were presented with each of the above risk factors after the following instruction: ‘I am now going to read out a list of things which may or may not increase your chances of getting cancer. For each one can you tell me how much you agree or disagree that it may increase your chances of getting cancer?’. The response options were dichotomized into awareness (tend to agree and strongly agree) and lack of awareness (tend to disagree, strongly disagree, and don’t know). ‘Don’t know’ was included in the category ‘lack of awareness’ because these respondents were not aware that the factor in question was a risk factor for cancer, hence lacked awareness. The proportion of respondents answering ‘don’t know’ was below 4 % for all risk factors except red/processed meat (6.4 %) and HPV-infection where 62 % responded they didn’t know what HPV is and 1.6 % answered ‘don’t know’. All missing observations (no answer) for risk factors were excluded from analysis. A composite measure of awareness was also created by counting the number of known risk factors for each respondent. Data is further presented in groups based on country (Denmark/Sweden), and 5-year age groups (30-34, 35-39… to 80+) or 10-year age groups (30-39, 40-49… to 70+).
Descriptive characteristics are reported as mean (standard deviation (SD)) or count (percent) to describe awareness of risk factors among Danish and Swedish respondents and across age groups. In a multivariable analysis (generalised linear model, GLM) using prevalence ratios (PRs) with 95 % confidence intervals (CIs), we estimated the association between country and awareness of each of the 13 risk factors when adjusting for age (continuous), gender (men; women), country of birth (Denmark/Sweden; other), cohabitation (living with partner; living alone), education (primary/lower secondary school; upper secondary; bachelor and higher), and experience of cancer (self and/or family/friends vs. none). Furthermore, interaction terms were included to test effect modification by age group (10-year intervals). Data were analysed using SAS 9.3, and IBM SPSS Statistics 20.
The Danish study was approved by the Danish Data Protection Agency (J. no. 2011-41-6237) and the Danish Health and Medicines Authority. In accordance with the Central Denmark Region Committees on Biomedical Research Ethics the study needed no further approval (Report no. 128/2010). The Swedish study was approved by the research ethics committee at Karolinska Institutet (Ref. no. 2011/699-31/2).
Sociodemographic characteristics of the respective samples in Denmark (n = 3000) and Sweden (n = 3070)
Age, mean (SD)*
Living with a partner
Primary and lower secondary
Bachelor and PhDa
Country of birth***
Country of current residence (DK/SE)
Experience of cancer
(self and/or family/friend)**
Prevalence of lack of awareness of individual risk factors for Denmark versus Sweden
PR (95 % CI)a
PR (95 % CI)a
Low fruit and vegetable intake
Sunburn in childhood
>70 years of age
Close relative with cancer
Low physical activity
Use of sunbeds
Lack of awareness of risk factors for Denmark vs. Sweden. Interaction and stratification by age
PR (95 % CI)a
Low fruit and vegetable intake
Sunburn in childhood
>70 years of age
Close relative with cancer
Low physical activity
Use of sunbeds
In this population-based study among adults aged 30 years or older in Denmark and Sweden the highest level of cancer risk factor awareness was reported for smoking, use of sunbeds and ionizing radiation with awareness levels of over 90 %. In both countries, the lowest levels of awareness were found for HPV-infection, low fruit and vegetable intake and alcohol intake as risk factors for cancer. Swedish respondents reported higher risk factor awareness than Danish respondents for ten of 13 risk factors studied. A decline in awareness was generally seen with increasing age in both countries, although deviating patterns were seen for alcohol intake, red/processed meat, obesity and age 70+.
Most of the risk factors examined are modifiable by the individual, whereas having a close relative with cancer and age over 70 years are not modifiable, and ionizing radiation and second-hand smoke are variable, and arguably under less individual control. We saw no clear pattern with respect to level of awareness among modifiable and non-modifiable risk factors. However, the risk factors for which Danish respondents reported higher awareness were both modifiable (low fruit and vegetable intake and use of sunbeds). The risk factors where awareness differed most between Denmark and Sweden, with higher awareness among Swedish respondents, were primarily non-modifiable (including age over 70 years, having a close relative with cancer and HPV-infection). A previous European study also found that awareness of family history and older age as risk factors specifically for colorectal cancer was higher in Sweden compared to Denmark . Similarly, Forbes et al.’s initial ICBP Module 2 study, restricted to respondents ≥50 years, found higher awareness in Sweden (38 %) than in Denmark (25 %) that cancer risk is higher in people aged ≥70 years than in younger age groups . Considering the importance of age as a risk factor for most cancers and the ageing populations the awareness of this risk factor was notably low among the respondents in our study, especially in Denmark.
Exposure to HPV-infections can to some extent be modified through sexual behaviour  and vaccinations. Considering the large amount of publicity given to HPV-vaccinations in both Denmark and Sweden, the low awareness of HPV-infections as a risk factor for cancer is also noteworthy, with as much as 62 % of respondents reporting not knowing what HPV is. Similar rates were found among 18-45-year old women in a Nordic study conducted in 2005, just before the release of HPV-vaccines .
It is unclear how to explain that the respondents in Sweden generally demonstrated higher awareness. Possibly this reflects an effect of different welfare policies or cultural differences. Management research shows large similarities between cultures in Sweden and Denmark, but a tendency for Swedish culture to be somewhat more collective and to have a stronger inclination to avoid uncertainty [26, 27]. Furthermore, Vallgarda  suggest that whereas the Swedish welfare policy programmes stress political responsibility to improve population health, the Danish programme is more liberal, emphasizing individual responsibility and autonomy. Examples of this are the alcohol retail monopoly that exists in Sweden but not in Denmark and differences in cancer screening programs, with nation-wide mammography screening established earlier in Sweden (1997)  than in Denmark (2008) .
The relatively low response rates may lead to an over-estimation of public awareness in both countries due to selection bias. Since the response rate was lower in Sweden there may be a more pronounced over-estimation of awareness, which would risk exaggerating the difference between countries. Immigrants and men 30-49 year of age were similarly underrepresented among the Swedish and Danish respondents. However, there was a higher proportion of people with higher education in the Swedish sample when comparing the Swedish and Danish respondents to the age-specific populations in their respective countries. A partial explanation for this may be that the two Swedish healthcare regions chosen for this study have a higher average level of education compared to the country as a whole. Hvidberg et al.  has found that low education was associated with lower awareness of risk factors for cancer among the Danish ICBP-respondents. To diminish the potential confounding effect that such selection mechanisms may have on the outcome we adjusted for education, age and other sociodemographic factors that we had data for in the multivariate analysis.
The questions used for this study were not particularly sensitive but we still acknowledge that there may have been a tendency among respondents to give socially desirable answers, which could have led to an underestimation of the lack of awareness. However, since the same questions and data collection methods were used in Sweden and Denmark there is little reason to believe that this type of information bias would have affected comparisons between countries.
Awareness of sunbed use as a risk factor for cancer was higher in Denmark, which may be a result of the Danish anti-sunbed campaign, specifically targeting young people. This campaign gave rise to an intense public debate about sunbed use, and subsequent use of sunbeds among the youngest age groups decreased . Other Danish nationwide campaigns have been addressing fruit and vegetable consumption, physical activity and obesity prior to data collection for the current study . Also throughout Sweden an annual campaign week concerning physical activity and healthy eating habits has been organized since 2010. However, it is important to point out that the cross-sectional design of the current study does not permit drawing conclusions about the impact of health campaigns or changes in awareness over time. Furthermore, even though high awareness of risk factors is an important component of primary prevention of cancer, it is not a straightforward predictor of behaviour [33, 34], which is the more important determinant of cancer outcomes.
The decrease in awareness with age may be an effect of the use of a prompted question format. Waller et al.  found that this format resulted in significantly higher awareness of risk factors and warning signs of cancer compared with the unprompted format, but decreasingly so with increasing age. Another possibility may be that younger age groups are more readily reached by health messages in different media and/or are more prone to assimilate new information that may perhaps challenge previously held beliefs. Interestingly, the youngest (30-34 years) age groups did not differ so much by country in terms of number of known risk factors. It may be possible that recent campaigns in Denmark have succeeded in reaching a younger segment of the population, or there may be an internationalization of information via e.g. social media and the Internet leading to decreased differences particularly among younger age groups. In line with our study, Hawkins et al.  found that 35-64 year olds in the U.S. were able to cite more cancer prevention strategies for cancer in general, compared to older age groups. A UK study found age-differences in awareness of infections, alcohol intake, sunburn and having a relative with cancer, but less of a consistent pattern .
Despite finding some interaction effects, the differences in awareness between Sweden and Denmark were generally consistent across age groups. The stratified analyses showed that the difference in awareness of alcohol intake as a risk factor was only statistically significant among those aged 60 and over. It appears that there may be a cohort effect of people who were teenagers and young adults in the 60s and 70s and who may have experienced different cultures around alcohol in Sweden and Denmark.
Even though the large population-based samples for both countries was one of the strengths of the present study, we still were challenged by smaller cell-sizes for some risk factors with low variability in responses in the age-stratified analyses. This same issue also caused a lack of discrimination in analysis of data from older respondents (70+), which is regrettable given the aging population and the potentially interesting patterns in the data from this group.
This study supports findings from other European studies that generally demonstrate modest public awareness of many established cancer risk factors. We found that Swedish respondents reported higher awareness than Danish respondents for ten of 13 cancer risk factors studied. A decline in awareness was generally seen with increasing age in both countries. Efforts can be made to increase awareness of the cancer risk factors HPV-infection, low fruit and vegetable intake and alcohol intake, which both the Swedish and the Danish population showed particularly low awareness of. Also, considering how strong increasing age is as a risk factor for cancer, it might be important to further increase awareness thereof as a means to stimulate appropriate healthcare seeking behaviour, especially in the Danish population.
One way to increase awareness, which has shown some success, could be to deliver tailored multiple risk factor health and lifestyle advice in conjunction with existing screening programs . Previous studies indicate that repeated, broad campaigns, as well as a multimedia approach, including e.g. television and the Internet, to reach different socioeconomic subgroups, are needed to attain changes in attitudes and behaviours [37–39].
The study was supported financially by the Danish Cancer Society, the Novo Nordic Foundation, the Faculty of Health at Aarhus University, the Tryg Foundation (J.no. 7-11-1339), the Danish Health and Medicines Authority, the Research Centre for Cancer Diagnosis in Primary Care (CaP) and the Swedish Association of Local Authorities and Regions.
Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
- Eurostat. Causes of death - Deaths by country of residence and occurrence. 2015. http://appsso.eurostat.ec.europa.eu/nui/show.do?dataset=hlth_cd_aro&lang=en. Accessed 16 April 2015.
- Coleman MP, Forman D, Bryant H, Butler J, Rachet B, Maringe C, et al. Cancer survival in Australia, Canada, Denmark, Norway, Sweden, and the UK, 1995-2007 (the International Cancer Benchmarking Partnership): an analysis of population-based cancer registry data. Lancet. 2011;377(9760):127–38.View ArticlePubMedPubMed CentralGoogle Scholar
- Butler J, Foot C, Bomb M, Hiom S, Coleman M, Bryant H, et al. The International Cancer Benchmarking Partnership: an international collaboration to inform cancer policy in Australia, Canada, Denmark, Norway, Sweden and the United Kingdom. Health Policy. 2013;112(1-2):148–55.View ArticlePubMedGoogle Scholar
- Engholm G, Ferlay J, Christensen N, Bray F, Gjerstorff ML, Klint A, et al. NORDCAN--a Nordic tool for cancer information, planning, quality control and research. Acta Oncol. 2010;49(5):725–36.View ArticlePubMedGoogle Scholar
- IARC. GLOBOCAN 2012: Estimated Cancer Incidence, Mortality and Prevalence Worldwide in 2012. 2013. http://globocan.iarc.fr. Accessed 16 April 2015.
- Hiatt RA, Rimer BK. A new strategy for cancer control research. Cancer Epidemiol Biomarkers Prev. 1999;8(11):957–64.PubMedGoogle Scholar
- Stein CJ, Colditz GA. Modifiable risk factors for cancer. Br J Cancer. 2004;90(2):299–303.View ArticlePubMedPubMed CentralGoogle Scholar
- Stewart BW, Kleinhues P. World Cancer Report. Lyon: IARCPress; 2003.Google Scholar
- Grunfeld EA, Ramirez AJ, Hunter MS, Richards MA. Women’s knowledge and beliefs regarding breast cancer. Br J Cancer. 2002;86(9):1373–8.View ArticlePubMedPubMed CentralGoogle Scholar
- Redeker C, Wardle J, Wilder D, Hiom S, Miles A. The launch of Cancer Research UK’s ‘Reduce the Risk’ campaign: baseline measurements of public awareness of cancer risk factors in 2004. Eur J Cancer. 2009;45(5):827–36.View ArticlePubMedGoogle Scholar
- Sanderson SC, Waller J, Jarvis MJ, Humphries SE, Wardle J. Awareness of lifestyle risk factors for cancer and heart disease among adults in the UK. Patient Educ Couns. 2009;74(2):221–7.View ArticlePubMedGoogle Scholar
- Wardle J, Waller J, Brunswick N, Jarvis MJ. Awareness of risk factors for cancer among British adults. Public Health. 2001;115(3):173–4.View ArticlePubMedGoogle Scholar
- Halpern AC, Kopp LJ. Awareness, knowledge and attitudes to non-melanoma skin cancer and actinic keratosis among the general public. Int J Dermatol. 2005;44(2):107–11.View ArticlePubMedGoogle Scholar
- Keighley MR, O'Morain C, Giacosa A, Ashorn M, Burroughs A, Crespi M, et al. Public awareness of risk factors and screening for colorectal cancer in Europe. Eur J Cancer Prev. 2004;13(4):257–62.View ArticlePubMedGoogle Scholar
- Breslow RA, Sorkin JD, Frey CM, Kessler LG. Americans’ knowledge of cancer risk and survival. Prev Med. 1997;26(2):170–7.View ArticlePubMedGoogle Scholar
- Cullinen KM, Caldwell MJ. Knowledge and behaviors related to colorectal cancer prevention among non-Hispanic black women in Rhode Island. Med Health R I. 2009;92(6):219–21.PubMedGoogle Scholar
- Hawkins NA, Berkowitz Z, Peipins LA. What does the public know about preventing cancer? Results from the Health Information National Trends Survey (HINTS). Health Educ Behav. 2010;37(4):490–503.View ArticlePubMedGoogle Scholar
- Hvidberg L, Pedersen AF, Wulff CN, Vedsted P. Cancer awareness and socio-economic position: results from a population-based study in Denmark. BMC Cancer. 2014;14:581.View ArticlePubMedPubMed CentralGoogle Scholar
- Inoue M, Iwasaki M, Otani T, Sasazuki S, Tsugane S. Public awareness of risk factors for cancer among the Japanese general population: a population-based survey. BMC Public Health. 2006;6:2.View ArticlePubMedPubMed CentralGoogle Scholar
- Paul C, Tzelepis F, Walsh RA, Girgis A, King L, McKenzie J. Has the investment in public cancer education delivered observable changes in knowledge over the past 10 years? Cancer. 2003;97(12):2931–9.View ArticlePubMedGoogle Scholar
- MacTiernan A, Fritschi L, Slevin T, Jalleh G, Donovan R, Heyworth J. Public perceptions of cancer risk factors: a Western Australian study. Health Promot J Austr. 2014;25(2):90–6.View ArticlePubMedGoogle Scholar
- Forbes LJ, Simon AE, Warburton F, Boniface D, Brain KE, Dessaix A, et al. Differences in cancer awareness and beliefs between Australia, Canada, Denmark, Norway, Sweden and the UK (the International Cancer Benchmarking Partnership): do they contribute to differences in cancer survival? Br J Cancer. 2013;108(2):292–300.View ArticlePubMedPubMed CentralGoogle Scholar
- Simon AE, Forbes LJ, Boniface D, Warburton F, Brain KE, Dessaix A, et al. An international measure of awareness and beliefs about cancer: development and testing of the ABC. BMJ Open. 2012;2(6). doi:10.1136/bmjopen-2012-001758.
- Bosch FX, de Sanjose S. The epidemiology of human papillomavirus infection and cervical cancer. Dis Markers. 2007;23(4):213–27.View ArticlePubMedPubMed CentralGoogle Scholar
- Nohr B, Munk C, Tryggvadottir L, Sparen P, Tran TN, Nygard M, et al. Awareness of human papillomavirus in a cohort of nearly 70,000 women from four Nordic countries. Acta Obstet Gynecol Scand. 2008;87(10):1048–54.View ArticlePubMedGoogle Scholar
- Hofstede G. National cultures in four dimensions: a research-based theory of cultural differences among nations. Int Stud Manage Organ. 1983;13(1-2):46–74.View ArticleGoogle Scholar
- Javidan M, House RJ. Cultural acumen from the global manager: lessons from Project GLOBE. Organ Dyn. 2001;29(4):289–305.View ArticleGoogle Scholar
- Vallgarda S. Public health policies: a Scandinavian model? Scand J Public Health. 2007;35(2):205–11.View ArticlePubMedGoogle Scholar
- Jonsson H, Tornberg S, Nystrom L, Lenner P. Service screening with mammography in Sweden--evaluation of effects of screening on breast cancer mortality in age group 40-49 years. Acta Oncol. 2000;39(5):617–23.View ArticlePubMedGoogle Scholar
- Vejborg I, Mikkelsen E, Garne JP, Bak M, Lernevall A, Mogensen NB, et al. Mammography screening in Denmark. Dan Med Bull. 2011;58(6):C4287.PubMedGoogle Scholar
- Koster B, Thorgaard C, Philip A, Clemmensen I. Sunbed use and campaign initiatives in the Danish population, 2007-2009: a cross-sectional study. J Eur Acad Dermatol Venereol. 2011;25(11):1351-5Google Scholar
- Nordic Cancer Union. The Danish Cancer Society - Kraeftens Bekaempelse. http://www.ncu.nu/Default.aspx?ID=29. Accessed 20 April 2015.
- Cook PA, Bellis MA. Knowing the risk: relationships between risk behaviour and health knowledge. Public Health. 2001;115(1):54–61.PubMedGoogle Scholar
- Weinstein ND. What does it mean to understand a risk? Evaluating risk comprehension. J Natl Cancer Inst Monogr. 1999;25:15–20.View ArticleGoogle Scholar
- Waller J, McCaffery K, Wardle J. Measuring cancer knowledge: comparing prompted and unprompted recall. Br J Psychol. 2004;95(Pt 2):219–34.View ArticlePubMedGoogle Scholar
- Senore C, Giordano L, Bellisario C, Di Stefano F, Segnan N. Population based cancer screening programmes as a teachable moment for primary prevention interventions. A review of the literature. Front Oncol. 2012;2:45.View ArticlePubMedPubMed CentralGoogle Scholar
- de Haas ER, Nijsten T, de Vries E. Population education in preventing skin cancer: from childhood to adulthood. J Drugs Dermatol. 2010;9(2):112–6.PubMedGoogle Scholar
- Sinclair C, Foley P. Skin cancer prevention in Australia. Br J Dermatol. 2009;161 Suppl 3:116–23.View ArticlePubMedGoogle Scholar
- Hay J, Coups EJ, Ford J, DiBonaventura M. Exposure to mass media health information, skin cancer beliefs, and sun protection behaviors in a United States probability sample. J Am Acad Dermatol. 2009;61(5):783–92.View ArticlePubMedPubMed CentralGoogle Scholar