Table I.
Baseline demographic data.
| Variable | Total (n = 226) | Union (n = 134) | Nonunion (n = 92) | p-value |
|---|---|---|---|---|
| Sex, female:male, n (%) | 115:111 (51:49) | 65:69 (49:51) | 50:42 (54:46) | 0.388* |
| Mean age, yrs (range) | 57 (19 to 91) | 53 (19 to 91) | 62 (21 to 91) | < 0.001†§ |
| Smoker, n (%) | 0.174* | |||
| Smoker | 65 (29) | 34 (25) | 31 (34) | |
| Non-smoker | 161 (71) | 100 (75) | 61 (66) | |
| Displacement, n (%) | < 0.001ठ| |||
| Not displaced | 6 (3) | 5 (4) | 1 (1) | |
| Displaced under a shaft width | 202 (89) | 126 (94) | 76 (83) | |
| Displaced over a shaft width | 18 (8) | 3 (2) | 15 (16) | |
| AO classification, n (%) | 0.200* | |||
| A (simple) | 153 (68) | 88 (65) | 65 (71) | |
| B (wedge fragment) | 54 (24) | 37 (28) | 17 (18) | |
| C (segmental) | 19 (8) | 9 (7) | 10 (11) | |
| Location, n (%) | < 0.001*§ | |||
| Proximal shaft | 38 (17) | 14 (10) | 24 (26) | |
| Mid-shaft | 175 (77) | 107 (80) | 68 (74) | |
| Distal shaft | 13 (6) | 13 (10) | 0 (0) |
*
Chi-squared test.
†
Mann-Whitney U test.
‡
Fisher’s exact test.
§
Statistically significant.