Table 1.
Age and age standardized characteristics according to cumulatively updated caffeine intake
| Categories of Cumulatively Updated Caffeine Intake (mg/day) | ||||||
|---|---|---|---|---|---|---|
| 0–149 | 150–299 | 300–449 | 450–599 | 600+ | ||
| % of total person-time | Women | 23.3 | 26.4 | 26.0 | 11.7 | 12.6 |
| Men | 46.0 | 22.6 | 15.9 | 8.2 | 7.3 | |
| Age (mean, yr) | Women | 58.5 | 59.1 | 57.6 | 57.8 | 54.6 |
| Men | 60.9 | 61.3 | 60.4 | 59.5 | 58.1 | |
| Caffeinated coffee (cups / day) | Women | 0.2 | 1.0 | 2.2 | 3.2 | 4.7 |
| Men | 0.2 | 1.2 | 2.3 | 3.1 | 4.3 | |
| Tea (cups / day) | Women | 0.5 | 1.0 | 0.8 | 0.9 | 0.7 |
| Men | 0.3 | 0.7 | 0.5 | 0.5 | 0.5 | |
| African Americans (%) | Women | 2.2 | 1.4 | 0.9 | 0.6 | 0.5 |
| Men | 1.0 | 0.7 | 0.3 | 0.2 | 0.2 | |
| Obesity (Body mass index ≥ 30 kg/m2, %) | Women | 22.6 | 22.2 | 19.7 | 20.8 | 18.6 |
| Men | 7.9 | 9.9 | 10.5 | 11.2 | 11.3 | |
| Hypertension (%) | Women | 36.8 | 35.8 | 32.2 | 30.4 | 26.6 |
| Men | 47.1 | 48.3 | 47.7 | 47.4 | 46.7 | |
| Diabetes (%) | Women | 6.4 | 5.9 | 4.8 | 4.4 | 4.0 |
| Men | 10.2 | 10.2 | 10.6 | 10.6 | 10.6 | |
| Highest quartile of physical activity (%) | Women | 25.8 | 25.3 | 24.6 | 23.8 | 21.5 |
| Men | 27.0 | 25.7 | 24.9 | 22.9 | 20.3 | |
| 30+ pack years of smoking (%) | Women | 9.3 | 12.3 | 17.6 | 25.3 | 38.5 |
| Men | 12.0 | 16.4 | 20.3 | 24.5 | 33.3 | |
| Alcohol intake (mean, g/day) | Women | 4.3 | 5.9 | 7.2 | 6.8 | 6.5 |
| Men | 9.0 | 12.2 | 13.7 | 12.6 | 11.2 | |
| Family history of glaucoma (%) | Women | 13.9 | 14.0 | 13.5 | 12.8 | 12.5 |
| Men | 11.3 | 12.3 | 11.6 | 11.1 | 10.6 | |
| Number of reported eye exams† | Women | 5.4 | 5.4 | 5.3 | 5.2 | 4.6 |
| Men | 4.7 | 4.9 | 4.9 | 4.7 | 4.5 | |
*
Age-standardized characteristics over the entire follow-up period, using 5-year intervals of age
†
Participants were asked up to 8 times during follow-up about eye exams in the past 2 years