Table 1.
Baseline characteristics by coffee drinking habits in normal glucose tolerance participants: The Strong Heart Study
| Characteristics | Coffee drinking status (cups/glasses per day) | P for trend | |||||
|---|---|---|---|---|---|---|---|
| 0 (n=111, 9.7%) | 1-2 (n=217, 19%) | 3-4 (n=290,25.4 %) | 5-7 (n=255, 22.3%) | 8-11 (n=176, 15.4%) | 12- (n =92, 8.1%) | ||
| Age, yrs (Mean, SD) | 53.8 (8.1) | 55.1(8.0) | 55.9(8.1) | 55.1(7.6) | 54.1(7.4) | 52.6(6.5) | 0.1 |
| BMI, kg/m2 (Mean, SD) | 29.3 (5.0) | 28.9(5.5) | 28.6(5.3) | 28.0(5.2) | 28.5(5.6) | 27.2(5.6) | 0.004 |
| Waist circumference, cm (Mean, SD) | 99.7 (12.6) | 99.8(14.0) | 99.5(13.1) | 97.2(12.4) | 99.0(13.9) | 94.2(13.8) | 0.002 |
| Physical activity, hrs/week (Median, Q1,Q3) | 18.9(4.6,37.6) | 16.4(3.7,31.8) | 14.1(2.6, 33.3) | 18.8(5.7,36.5) | 17.2(6.2,33.4) | 18.1(4.6,37.5) | 0.3 |
| Fasting glucose, mg/dl (Median, Q1,Q3) | 99(93,104) | 98(91,103) | 98(92,103) | 96(92,102) | 99(93, 104) | 96(92, 102) | 0.2 |
| Gender (% female) | 63.1 | 59.9 | 51.4 | 47.8 | 47.2 | 48.9 | 0.0008 |
| Smoking (%) | |||||||
| Past | 27.9 | 33.2 | 33.1 | 25.1 | 26.7 | 17.4 | 0.01 |
| Current | 30.6 | 24.9 | 40.0 | 53.7 | 60.8 | 77.2 | 0.0001 |
| Alcohol use (%) | |||||||
| Past | 36.0 | 38.9 | 38.3 | 37.0 | 43.2 | 40.2 | 0.4 |
| Current | 45.1 | 45.8 | 48.6 | 49.6 | 52.3 | 50.0 | 0.2 |
| Hypertension (%) | 37.8 | 27.4 | 31.1 | 19.8 | 21.7 | 12.1 | 0.0001 |
| Parental history of diabetes | 36.9 | 30.9 | 35.2 | 32.6 | 43.2 | 42.4 | 0.05 |