Table 3.
Selected characteristics of the study sample by total coffee consumption at baseline, the Norwegian Women and Cancer Study, 1996–2013 - complete case analyses
| Characteristics | Total coffee consumption | |||
|---|---|---|---|---|
| Light consumers | Low-moderate consumers | High-moderate consumers | Heavy consumers | |
| ≤1 cup/day | >1–3 cups/day | >3–5 cups/day | >5 cups/day | |
| Age at baseline (y), mean (SD) | 47.8 (8.6) | 49.0 (8.7) | 47.4 (8.2) | 46.3 (7.8) |
| Age at study exit (y), mean (SD) | 63.4 (6.8) | 64.6 (7.3) | 64.1 (6.9) | 63.5 (6.5) |
| Smoking status, % | ||||
| Never | 50.8 | 42.4 | 31.6 | 17.1 |
| Former | 31.5 | 35.9 | 33.2 | 26.6 |
| Current | 17.7 | 21.7 | 35.2 | 56.3 |
| Duration of education (y), mean (SD) | 13.1 (3.6) | 12.5 (3.5) | 11.9 (3.3) | 11.1 (3.1) |
| Body mass index, mean (SD) | 24.0 (4.2) | 24.0 (3.8) | 23.9 (3.7) | 24.0 (3.9) |
| Physical activity level, mean (SD) | 5.5 (1.9) | 5.7 (1.8) | 5.7 (1.9) | 5.5 (2.0) |
| Alcohol consumption (g/day), mean (SD) | 3.0 (5.5) | 3.4 (4.9) | 3.3 (4.6) | 3.2 (6.9) |
| Average number of sunburns per year, mean (SD) | 0.9 (0.7) | 0.8 (0.7) | 0.8 (0.7) | 0.8 (0.7) |
| Original hair color, % | ||||
| Dark | 17.7 | 17.1 | 17.1 | 17.6 |
| Brown | 38.9 | 39.6 | 40.0 | 40.0 |
| Blond | 40.5 | 40.2 | 40.0 | 39.4 |
| Ginger | 2.9 | 3.1 | 2.8 | 3.0 |
| Number of moles larger than 5 mm, % | ||||
| 0 | 88.3 | 88.7 | 88.6 | 88.8 |
| 1 | 6.9 | 6.5 | 6.7 | 6.6 |
| 2–3 | 3.3 | 3.3 | 3.3 | 3.0 |
| 4–6 | 0.9 | 0.8 | 0.9 | 0.9 |
| 7–12 | 0.3 | 0.3 | 0.3 | 0.5 |
| 13–24 | 0.1 | 0.1 | 0.2 | 0.1 |
| ≥25 | 0.1 | 0.1 | 0.1 | 0.1 |
| Area of residence, % | ||||
| Oslo area | 14.7 | 10.2 | 7.2 | 5.3 |
| Eastern Norway | 39.9 | 36.2 | 34.8 | 30.7 |
| Southern Norway | 5.0 | 4.6 | 4.7 | 4.7 |
| Western Norway | 20.1 | 23.2 | 22.3 | 19.3 |
| Middle Norway | 6.7 | 7.7 | 8.2 | 9.0 |
| Northern Norway | 13.7 | 18.1 | 22.8 | 30.9 |
y years, SD standard deviation