Number of patients experiencing fractures within 5 years in strata A, B and C combined: effect of etidronate
| Et and Et + Ca(n = 169) | No treatment and Ca(n = 180) | Statistics | |
|---|---|---|---|
| *New = either a new vertebral fracture or an extension of an existing vertebral fracture. | |||
| Et, etidronate; Ca, calcium. | |||
| No of patients with new symptomatic fractures | 14 (8.3%) | 14 (7.8%) | χ2c = 0.0, p = 1.00 |
| No of patients with new* semi-quantitative vertebral fractures detected on spine radiographs | 16 (9.5%) | 26 (14.4%) | χ2c = 1.6, p = 0.21 |
| Either of above | 27 (16%) | 34 (18.9%) | χ2c = 0.3, p = 0.57 |
| No of fractures in: | |||
| (a) those with fractures at entry | 13/63 (20.6%) | 15/54 (27.8%) | Breslow-Day interaction test: |
| (b) those without fractures at entry | 14/106 (13.2%) | 19/125 (15.2%) | χ2c = 0.1, p = 0.73 |