Table 3.

Correlation between forearm spectrophotometer readings and past-week measures of sun exposure and protection among a subsample of VIRUSCAN study participants (n = 159), Tampa, FL, 2014–2017.

Forearm spectrophotometer readingsa
Low (≤11.55)High (>11.55)
Questionnaire measurement of exposure/protectionn (%)n (%)OR (95% CI)b
Exposure scale
 T145 (56.2)34 (43.0)1.00 (Reference)
 T222 (27.5)21 (26.6)1.03 (0.45–2.32)
 T313 (16.2)24 (30.4)2.48 (1.01–6.33)
Ptrendc = 0.06
Protection scale
 T129 (36.2)30 (38.0)1.00 (Reference)
 T226 (32.5)26 (32.9)0.97 (0.42–2.24)
 T325 (31.2)23 (29.1)0.76 (0.32–1.75)
Ptrend = 0.54
Ratio of exposure/protection scales
 T137 (46.8)23 (29.1)1.00 (Reference)
 T226 (32.9)24 (30.4)1.14 (0.49–2.61)
 T316 (20.3)32 (40.5)2.89 (1.24–6.95)
Ptrend = 0.01
  • aForearm spectrophotometer readings were dichotomized based on the median value.

  • bOR and 95% confidence interval were calculated using logistic regression, adjusted for age and gender.

  • cThe median score/ratio of each group was used to test the trend between score and spectrophotometer readings, using logistic regression adjusted for age and gender.