Table 1. Baseline characteristics, Full Sample and Stratified by Top Quartile of Kyphosis [Mean, (SD) or %].
Baseline characteristics, full sample and stratified by top quartile of kyphosis
| Baseline characteristics | Full sample (n=994) | Top Quartile of Cobb angle (n=254) | Bottom 3 quartiles of Cobb angle (n=740) | p-value |
|---|---|---|---|---|
| Cobb angle (degrees) | 44.9 (11.8) | 60.6 (6.2) | 39.5 (7.7) | < .0001 |
| Age, years | 69.4 (4.0) | 69.7 (4.1) | 69.2 (4.0) | .08 |
| BMI (kg/m2) | 26.3 (4.4) | 26.5 (4.2) | 26.3 (4.4) | .42 |
| Height (cm) | 160.1 (6.0) | 160 (6.2) | 160 (5.9) | .87 |
| Weight (kg) | 67.5 (11.6) | 68.0 (11.3) | 67.3 (11.7) | .39 |
| Calcaneal BMD (gm/cm2) | 0.42 (.09) | 0.40 (.09) | 0.42 (.08) | .0001 |
| Maximum grip strength (kg) | 23.2 (4.0) | 22.7 (4.1) | 23.3 (4.0) | 0.03 |
| Prevalent vertebral fractures (yes/no) | 14.7 | 27.6 | 10.3 | < .0001 |
| Previous non-spine fracture (yes/no) | 32.2 | 36.8 | 30.7 | .07 |
| Any falls in past 12 months (yes/no) | 27.6 | 32.0 | 26.2 | 0.08 |
| Self-reported health (% good/excellent) | 89.8 | 89.9 | 89.8 | .96 |
| Physical activity (calories burned/week) | 1921 (1826) | 1855 (1765) | 1943 (1847) | .51 |
| Pack years smoking | 8.64 (16.4) | 7.4 (16.2) | 9.1 (16.5) | .16 |
| Alcohol use (# drinks/week) | 2.05 (4.2) | 1.45 (2.89) | 2.25 (4.57) | .001 |