Lifetime history of indoor tanning in young people: a retrospective assessment of initiation, persistence, and correlates

Table 4 Correlates of persistent indoor tanning among female indoor tanners age 31 and over (n = 170)

		% Persistently
		Tanned	Univariate			Multivariate
Characteristic	N	Indoors	OR (95% CI)	P value^a	N	OR (95% CI)	P value^b
Eye color
Brown	71	28	1.00	0.431
Hazel	36	28	0.98 (0.40 - 2.40)
Green	14	29	1.02 (0.29 - 3.63)
Blue/grey	49	16	0.50 (0.20 - 1.25)
Skin color
Olive	33	27	1.00	0.902
Fair	106	24	0.82 (0.34 2.0)
Very fair	31	26	0.93 (0.31 - 2.82)
Skin reaction with first summer sun exposure
Sunburn	76	18	1.00	0.085
Tan	94	30	1.88 (0.91 - 3.90)
Skin reaction with prolonged sun exposure
Deep Tan	35	40	1.00	0.023	35	1.00	0.031
No/Mild/Moderate Tan	135	21	0.39 (0.18 - 0.87)		135	0.39 (0.16 - 0.91)
BMI (kg/m²)	170	-	1.02 (0.96 - 1.08)	0.535
Pounds Gained since age 18 (per 10 lbs)	170	-	1.14 (0.86 - 1.49)	0.364
Alcoholic drinks under age 25 (per 300 drinks)	170	-	1.05 (1.01 - 1.09)	0.015	170	1.05 (1.01 -1.09)	0.015
Alcoholic drinks/year over age 25 (per 100 drinks)	170	-	1.09 (0.96 - 1.23)	0.156
Smoking Status
Not Current Smoker	144	23	1.00	0.217
Current Smoker	26	35	1.78 (0.73 - 4.37)
Education
Less than Bachelor's Degree	57	39	1.00	0.003	57	1.00	0.002
Bachelor's Degree or more	113	18	0.34 (0.17 - 0.70)		113	0.29 (0.14 -0.63)
Sunbathing session ages 8-15 (per 50 sessions)	170	-	1.09 (0.99 - 1.21)	0.087
Sunbathing session ages 16-25 (per 50 sessions)	170	-	1.10 (1.01 - 1.20)	0.033	170	1.10 (1.00 -1.21)	0.044
Sunbathing session ages 26+ (per 50 sessions)	169	-	1.09 (0.99 - 1.20)	0.086
Age at skin biopsy	170	-	0.93 (0.80 - 1.08)	0.344

^a P values are from likelihood ratio tests comparing a model with the variable of interest to the null model.
^b P values are from likelihood ratio tests comparing the full model to the full model minus the variable of interest.
BMI body mass index; CI confidence interval; OR odds ratio

ISSN: 1471-2458