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. Author manuscript; available in PMC: 2018 Jun 1.
Published in final edited form as: Prev Med. 2017 Mar 18;99:326–331. doi: 10.1016/j.ypmed.2017.03.007

Table 4.

Unadjusted percentage of US adults who used an indoor tanning device in the past 12 months by beliefs about vitamin D, SummerStyles 2015 online survey data.

% (95% CI)a P-valueb
If I regularly protect my skin from the sun, I will be at risk of not getting enough vitamin D. 0.39
 Agree (n = 790) 3.1 (1.9, 5.1)
 Disagree (n = 3302) 2.4 (1.8, 3.0)
I can get enough vitamin D from the foods I eat and the vitamins I take. 0.39
 Agree (n = 1810) 2.2 (1.6, 3.1)
 Disagree (n = 2279) 2.7 (2.0, 3.7)
Indoor tanning is an effective way to get vitamin D. <0.001
 Agree (n = 196) 13.8 (9.2, 20.0)
 Disagree (n = 3893) 1.9 (1.4, 2.5)

Abbreviations: n = sample size; CI = confidence interval.

a

CI = percentages and 95% CIs are weighted to the study population.

b

P value was calculated with the Wald chi-square statistic. Boldface indicates statistical significance (P < 0.05).