Table 4. Associations between bibliometric factors and PSM reproducibility.
| Methodologic Characteristic | Proportion of Studies (n, %) ‡ | Overall P-value† | Univariate Logistic Regression | ||||
|---|---|---|---|---|---|---|---|
| Overall | Fully Reproducible | Not Fully Reproducible | OR | 95% CI | P Value | ||
| (N = 92) | (N = 16) | (N = 76) | |||||
| Inclusion of Statistician Co-Author* | 44 (55.0) | 10 (66.7) | 34 (52.3) | 0.314 | 1.83 | 0.56–5.93 | 0.318 |
| Study Design | 0.272 | ||||||
| Journal | 0.616 | ||||||
| Impact Factor | 2.38 (2.31–2.44) | 2.44 (2.33–3.5) | 2.34 (2.31–2.44) | 0.163 | 2.76 | 1.06–7.22 | 0.039 |
| Subspecialty | 0.344 | ||||||
| General | 7 (7.6) | 0 (0.0) | 7 (9.2) | ||||
| Head & Neck | 46 (50.0) | 7 (43.8) | 39 (51.3) | ||||
| Laryngology | 2 (2.2) | 0 (0.0) | 2 (2.6) | ||||
| Otology | 16 (17.4) | 3 (18.8) | 13 (17.1) | ||||
| Rhinology | 11 (12.0) | 2 (12.5) | 9 (11.8) | ||||
| Thyroid | 10 (10.9) | 4 (25.0) | 6 (7.9) | ||||
| Year of Publication | 0.398 | 0.92 | 0.68–1.24 | 0.581 | |||
| Matched Cohort Size | 924 (218–3948) | 2179 (282–5174) | 924 (188–3494) | 0.455 | 1.00 | 1.00–1.00 | 0.921 |
| Original Cohort Size | 1438 (403–6900) | 3560 (507–10265) | 1291 (403–4796) | 0.301 | 1.00 | 1.00–1.00 | 0.992 |
*The presence of a statistician co-author could not be identified in 11 studies, and those studies were excluded from analyses.
†Overall p values were calculated by chi-squared analysis, Fisher’s Exact Test, or the Wilcoxon Rank Sum Test where appropriate
‡ Reported as # studies reporting methodological characteristic/total # of studies in subgroup (%) for categorical variables and median (first quartile, third quartile) for continuous non-parametric variables.