Table 3. Results of ANCOVA models comparing outcomes by whether participant used Solar Cell.

Outcome Measures	Use of Solar Cell*
	Did Not Use	Used	Test statistic	p-value
Sunburn Prevalence in the Past 3 Months
Sunburned1, 2, 4, 6, 17 (n=219)	32.3%†	20.7%	χ2=2.34	0.13
Number of sunburns1, 3 (n=218)	0.78§	0.43	F=3.35	0.07
Time Spent Outdoors in the Sun Between 10 am and 4 pm in the Past 3 Months
Number of days1, 5, 16 (n=221)	45.77§	41.67	F=1.60	0.21
Number of hours1, 3, 5, 16 (n=218)	135.30§	98.66	F=5.89	0.02
Sun Protection Practices While Outdoors in the Sun Between 10 am and 4 pm in the Past 3 Months
Percent of days wearing sunscreen with SPF 15 or greater1, 3, 5, 6, 11, 14 (n=171)	26.5%§	29.9%	F=0.63	0.43
Percent of days wearing a sunscreen lip balm with SPF 15 or greater1, 5 (n=176)	17.7%§	17.5%	F=0.00	0.96
Percent of days wearing clothing that protected the skin from the sun1, 5, 9, 17 (n=172)	18.8%§	26.4%	F=2.54	0.11
Percent of days wearing a hat with a wide brim1, 5, 7, 11, 15, 16 (n=183)	12.0%§	13.0%	F=0.11	0.74
Percent of days wearing sunglasses1, 10, 15 (n=192)	62.5%§	65.4%	F=0.43	0.51
Percent of days keeping time in the sun to a minimum1, 5, 7, 17 (n=180)	49.3%§	60.4%	F=4.19	0.04
Percent of days staying in the shade1, 5, 9, 15, 17 (n=170)	40.2%§	40.2%	F=0.00	0.99
Mean percent of days using all sun protection practices1, 5, 7, 17 (n=202)	33.8%§	39.4%	F=4.07	0.04

^*Use was defined as running Solar Cell and receiving the feedback screen at least once.

^†Actual means

^§Least square means

Covariates controlled in the models:

¹Baseline value;

²Age;

³Education;

⁴Race/Ethnicity;

⁵Gender;

⁶Skin score (Phenotypic Index);

⁷Skin cancer;

⁸Household head;

⁹Household size;

¹⁰Housing type;

¹¹Income;

¹²Marital status;

¹³MSA status;

¹⁴Ownership status of living quarters;

¹⁵Kids under 18;

¹⁶Employment status; and

¹⁷Do you agree or disagree that I look healthier and better when I tan?