A randomized controlled trial to evaluate the impact of a geo-specific poster compared to a general poster for effecting change in perceived threat and intention to avoid drowning ‘hotspots’ among children of migrant workers: evidence from Ningbo, China

Table 1 Description of the study sample

		Control	Intervention	Chi-Square	p-value
N		372	380
Do you believe that drowning is a serious health problem in Ningbo city?	No	70.70	73.42
	Yes	29.30	26.58	0.692	0.405
Do you believe that there are lots of drowning-risk waters around you?	No	73.66	78.42
	Yes	26.34	21.58	2.344	0.126
Do you believe that the likelihood of your accessing a drowning-risk water is great?	No	83.87	87.89
	Yes	16.13	12.11	2.514	0.113
Would you intend to avoid accessing to those drowning-risk waters when being exposed?	No	21.24	18.42
	Yes	78.76	81.58	0.938	0.333
Gender	Boys	46.51	45.00
Gender	Girls	53.49	55.00	0.172	0.679
Age Group	9-11y	43.02	42.89
	12-13y	28.49	29.74
	14-17y	28.49	27.37	0.036	0.982
School Grade	4	18.82	19.47
	5	19.35	18.95
	6	18.01	17.89
	7	13.44	14.21
	8	15.59	14.47
	9	14.78	15.00	0.303	0.998
School	1	32.26	32.63
	2	22.85	23.16
	3	44.89	44.21	0.036	0.982

ISSN: 1471-2458