Table 1.
Baseline characteristics of men with and without non-melanoma skin cancer (NMSC)
| Characteristics | NMSC (n = 178) | No NMSC (n = 930) | p-value |
|---|---|---|---|
| Mean (SD) | |||
| Age, years | 73.6 (5.7) | 73.2 (5.6) | 0.35 |
| BMI, kg/m2 | 27.2 (3.6) | 27.6 (3.7) | 0.13 |
| Daily vitamin D intakea, IU | 182 (125) | 160 (114) | 0.05 |
| Daily calcium intakea, IU | 821 (415) | 807 (385) | 0.66 |
| Outdoor walking activity | 14.3 (13.1) | 17.1 (18.8) | 0.02 |
| Number (%) | |||
| Current smokers | 2 (1.1%) | 31 (3.3%) | 0.11 |
| Spent >1 week confined to bed | 8 (4.5%) | 37 (3.9%) | 0.75 |
| Season of blood draw | |||
| Winter | 33 (19%) | 202 (22%) | 0.58 |
| Spring | 47 (26%) | 244 (26%) | |
| Summer | 49 (27%) | 268 (29%) | |
| Fall | 49 (27%) | 216 (23%) | |
| Clinic | |||
| Minneapolis | 21 (12%) | 164 (17%) | 0.03 |
| Pittsburgh | 28 (16%) | 199 (21%) | |
| Portland | 29 (16%) | 140 (15%) | |
| Birmingham | 33 (18%) | 134 (14%) | |
| Palo Alto | 25 (14%) | 143 (15%) | |
| San Diego | 42 (24%) | 150 (16%) | |
| Education | |||
| Elementary | 2 (1.1%) | 15 (1.6%) | 0.54 |
| High school | 35 (20%) | 212 (23%) | |
| College | 70 (39%) | 381 (41%) | |
aCombined intake from diet and supplements