| Variable | FR indexa | P value for associationb | ||||
| 0 | 1 - 4 | 5 - 10 | 11 - 15 | |||
| Age | ||||||
| ≤50 years (n = 152) | 25 (16.4) | 44 (28.9) | 66 (43.4) | 17 (11.2) | 0.853 | |
| 51 - 60 years (n = 257) | 49 (19.1) | 63 (24.5) | 118 (45.9) | 27 (10.5) | ||
| >60 years (n = 157) | 22 (14.0) | 43 (27.4) | 75 (47.8) | 17 (10.8) | ||
| Gender | ||||||
| Female (n = 131) | 30 (22.9) | 27 (20.6) | 61 (46.6) | 13 (9.9) | 0.116 | |
| Male (n = 435) | 66 (15.2) | 123 (28.3) | 198 (45.5) | 48 (11.0) | ||
| BMI | ||||||
| ≤25 kg/m2 (n = 464) | 84 (18.1) | 134 (28.9) | 208 (44.8) | 38 (8.2) | <0.001 | |
| >25 kg/m2 (n = 102) | 12 (11.8) | 16 (15.7) | 51 (50.0) | 23 (22.5) | ||
| Hypertension | ||||||
| Hypertensive (n = 370) | 31 (8.4) | 79 (21.3) | 205 (55.4) | 55 (14.9) | <0.001 | |
| Nonhypertensive (n = 196) | 65 (33.2) | 71 (36.2) | 54 (27.5) | 6 (3.1) | ||
| Diabetes | ||||||
| Diabetic (n = 214) | 15 (7.0) | 16 (7.5) | 126 (58.9) | 57 (26.6) | <0.001 | |
| Nondiabetic (n = 352) | 81 (23.0) | 134 (38.1) | 133 (37.8) | 4 (1.1) | ||
| Smoking | ||||||
| Smoker (n = 359) | 29 (8.1) | 65 (18.1) | 208 (57.9) | 57 (15.9) | <0.001 | |
| Nonsmoker (n = 207) | 67 (32.4) | 85 (41.1) | 51 (24.6) | 4 (1.9) | ||