Table 1.
Demographic and personal characteristics by quintiles of ambient average lifetime summer temperature (lagged by 20 years) in the U.S. Radiologic Technologists study, N= 64,566
| Characteristics | Ambient average lifetime summer temperature1 |
||||
|---|---|---|---|---|---|
| Quintile 1 | Quintile 2 | Quintile 3 | Quintile 4 | Quintile 5 | |
| Sex, female (%) | 80.5 | 82.9 | 79.2 | 78.2 | 76.7 |
| Age, median (years)2 | 37.3 | 36.6 | 36.7 | 37.1 | 37.7 |
| College or graduate education (%)3 | 38.2 | 37.2 | 40.0 | 40.9 | 40.2 |
| Body Mass Index, median (kg/m2)2 | 22.9 | 22.8 | 22.9 | 23.0 | 23.0 |
| Ever smokers (%)2 | 49.4 | 50.4 | 50.0 | 51.4 | 49.9 |
| Complexion, self-reported light skin (%)3 | 37.8 | 37.9 | 37.3 | 35.8 | 33.0 |
| Hair color, red or blond (%)3 | 18.5 | 18.7 | 17.9 | 18.7 | 18.3 |
| Eye color, blue (%)3 | 27.6 | 26.4 | 26.2 | 24.4 | 21.7 |
| Ambient summer UVR exposure, median, (J/m2)4 | 172.8 | 178.3 | 185.4 | 196.3 | 223.6 |
| Time outdoors (summer) hrs/week, median4 | 19.0 | 18.9 | 18.6 | 18.7 | 18.0 |
| Occupational ionizing radiation dose, median (cGy)2 | 4.1 | 4.0 | 3.9 | 4.2 | 4.8 |
| Follow-up time, median (years)4 | 19.4 | 19.4 | 19.4 | 19.3 | 18.9 |
1
Average lifetime summer (June-August) temperature (lagged by 20 years) as of the exit date; quintiles: 1st, 46.3–69.0; 2nd, 69.0–71.2; 3rd, 71.2–73.3; 4th, 73.3–76.6; 5th, 76.6–93.6 F0. Missing included in the denominator.
2
As of baseline.
3
As of third questionnaire (2003–2005).
4
As of exit date.