Table 5. Study Characteristics Associated with the Yearly Citation Rates of Case Reports.
| Variable | Number | Mean citations | Univariate | Multivariate (95% CIs) |
|---|---|---|---|---|
| Trauma related | P=0.240* | |||
| Non-traumatic | 73 | 0.42±0.44 | ||
| Traumatic | 44 | 0.29±0.66 | ||
| Number of authors | R2=0.040 | |||
| B=-0.074 | ||||
| P=0.031† | ||||
| Number of cases | R2=0.000 | |||
| B=-0.022 | ||||
| P=0.855† | ||||
| Clinical location | P=0.442‡ | |||
| Hip | 68 | 0.26±0.48 | Reference | |
| Pelvis | 24 | 0.46±0.66 | P=0.455 (-0.57-0.17) | |
| Femur | 23 | 0.33±0.57 | P=0.939 (-0.40-0.27) | |
| Unclassified | 2 | 1.28±1.57 | P=0.148 (0.87-2.08) |
Values are presented as number only or mean±standard deviation.
CIs: confidence intervals, B: regression coefficient.
*Student t-test, †Univariate linear regression test, ‡Kruskal-Wallis test.