Table 1 Baseline characteristics of the study population according to treatment group
From: The effect of zoledronic acid on type and volume of Modic changes among patients with low back pain
Characteristics | Total | Zoledronic acid n = 19 | Placebo n = 20 |
|---|---|---|---|
Sex, n (%) men | 25 (64.1) | 14 (73.7) | 11 (55.0) |
Age, mean (SD) years | 50.4 (8.4) | 49.4 (9.5) | 51.5 (7.3) |
Smoking, n (%) regular smokersa | 11 (28.2) | 5 (26.3) | 6 (30.0) |
BMI, mean (SD) kg/m | 26.8 (3.2) | 26.2 (3.3) | 27.4 (3.2) |
Duration of LBP, median (IQ range) days | 315 (212, 365) | 330 (200, 365) | 300 (270, 365) |
Intensity of LBP, mean (SD)b | 6.6 (1.5) | 6.5 (1.4) | 6.8 (1.6) |
Oswestry Disability Index, mean % (SD) | 32.9 (10.4) | 30.7 (10.9) | 34.9 (9.8) |
Duration of sick leave during the past year, median (IQ range) days | 20 (0, 65) | 20 (0, 50) | 18 (1, 181) |