| PMC full text: | Cancer Epidemiol Biomarkers Prev. Author manuscript; available in PMC 2010 Feb 1. Published in final edited form as: Cancer Epidemiol Biomarkers Prev. 2009 Feb; 18(2): 464–471. Published online 2009 Feb 3. doi: 10.1158/1055-9965.EPI-08-0894 |
Table 1
Comparison of average number of hours spent outdoors in the summer during 9:00 AM and 3:00 PM per year among 124 U.S. radiologic technologists from two geographic regions, according to type of questionnaire approach
| Time-based questionnaire | Activity-based questionnaire | |||
|---|---|---|---|---|
| Mean* | SD* | Mean* | SD* | |
| Total population | ||||
| Childhood & adolescence (ages 0–19) | 332.16 | 112.53 | 313.80 | 148.35 |
| Adult years (ages 20+) | 181.027 | 87.70 | 382.90 | 245.38 |
| Lifetime (all ages) | 229.61 | 84.06 | 363.63 | 196.77 |
| Female | ||||
| Childhood & adolescence ages 0–19) | 289.29 | 100.17 | 272.02 | 123.41 |
| Adult years (ages 20+) | 150.99 | 64.73 | 347.42 | 184.46 |
| Lifetime (all ages) | 197.36 | 66.12 | 323.03 | 144.19 |
| Male | ||||
| Childhood & adolescence (ages 0–19) | 383.12 | 105.67 | 363.46 | 160.90 |
| Adult years (ages 20+) | 215.50 | 97.97 | 423.64 | 297.19 |
| Lifetime (all ages) | 269.60 | 87.28 | 413.98 | 239.08 |
Abbreviation used: SD, standard deviation.
*Mean and standard deviation calculated based on the average of test and retest questionnaires.