Table II.
Age distribution and gender comparisons of age at inclusion. Overall and pre-OSS subgroups were analyzed by ANOVA with gender specific and combined means and gender difference (female-male). For age subgroups, Gamma regression was used, and results are shown as back-transformed means and gender ratios (female/male). In addition, 95% confidence intervals (CI) are given.
| Subgroups | N | Mean age (95% CI) | Comparison (95% CI) | P value |
|---|---|---|---|---|
| Pre-OSS | Female-Male difference | |||
| Low | ||||
| Total | 23 | 48.0 (42.7-53.2) | ||
| Female | 19 | 48.1 (43.8-52.5) | ||
| Male | 4 | 47.8 (38.3-57.3) | 0.31 (−10.1 to 10.7) | .951 |
| Moderate | ||||
| Total | 48 | 52.8 (49.7-55.8) | ||
| Female | 24 | 52.3 (48.0-56.7) | ||
| Male | 24 | 53.2 (48.8-57.5) | −0.83 (−6.97 to 5.30) | .786 |
| High | ||||
| Total | 60 | 51.2 (47.4-55.0) | ||
| Female | 24 | 53.2 (47.3-59.2) | ||
| Male | 36 | 49.1 (44.3-54.0) | 4.09 (−3.56 to 11.7) | .289 |
| Age group | Female/Male ratio | |||
| 18-49 y | ||||
| Total | 63 | 41.1 (39.0-42.8) | ||
| Female | 31 | 42.2 (39.4-44.3) | ||
| Male | 32 | 39.8 (36.2-42.5) | 0.76 (0.50 to 1.18) | .222 |
| 50-59 y | ||||
| Total | 33 | 54.3 (53.4-55.5) | ||
| Female | 20 | 54.2 (53.1-55.6) | ||
| Male | 13 | 54.5 (53.1-56.5) | 0.93 (0.57 to 1.51) | .772 |
| 60+ y | ||||
| Total | 35 | 66.0 (64.3-68.3) | ||
| Female | 16 | 66.0 (63.7-69.6) | ||
| Male | 19 | 66.0 (63.9-69.3) | 0.99 (0.52 to 1.89) | .986 |
OSS, Oxford Shoulder Score; CI, confidence interval.