Table 2.
Comparison of preoperative factors between bisphosphonate and control cohorts
| Parameter | Unit | BC (n = 25) | CC (n = 20) | p value | Test |
|---|---|---|---|---|---|
| Bisphosphonate | Year | 7.6 (SD = 3.4) | – | – | – |
| Age | Year | 71 (SD = 11) | 74 (SD = 14) | 0.38 | Student’s t-test |
| Low-energy mechanism | % | 96 | 84 | 0.18 | Chi-square |
| Tobacco use | % | 20 | 11 | 0.36 | Chi-square |
| Alcohol use | % | 16 | 11 | 0.6 | Chi-square |
| Diabetes | % | 12 | 5 | 0.44 | Chi-square |
| History of steroids | % | 0 | 0 | – | – |
| Osteoporosis (DEXA) | % | 24 | 5 | 0.09 | Chi-square |
| BMI | 25.5 (SD = 4.5) | 25.6 (SD = 7.0) | 0.95 | Student’s t-test | |
| Proximal 1/3 femur | % | 48 | 40 | 0.59 | Chi-square |
| Distance from LT | mm | 58 (SD = 52) | 99 (SD = 49) | 0.076 | Student’s t-test |
| Cortex /shaft | % | 24 | 15 | < 0.0001 | Student’s t-test |
BC = bisphosphonate cohort; CC = control cohort; LT = lesser trochanter; SD cited when appropriate.