Table 2.
Univariable Cox proportional hazards regression analyses
| Hazard ratio | (95% CI) | p value | |
|---|---|---|---|
| A. CPR derivation | |||
| 1. Study design | 0.9409 | ||
| Cohort | 0.96 | (0.29–3.17) | |
| Case-control | 1 | – | |
| 2. Geographic location | 0.0002 | ||
| USA | 4.15 | (1.89–9.13) | |
| Other | 1 | – | |
| 3. Log10(sample size) | 2.32 | (1.37–3.91) | 0.0035 |
| 4. Number of predictors | 1.01 | (0.92–1.12) | 0.7833 |
| 5. Presentation format | 0.1095 | ||
| User-friendly | 1.82 | (0.88–3.79) | |
| Not user-friendly | 1 | – | |
| 6. Validation in derivation | 0.0257 | ||
| External | 0.19 | (0.03–1.42) | |
| Internal | 1.73 | (0.77–3.90) | |
| None | 1 | – | |
| B. Reporting and publication | |||
| 1. Description of participants | 0.3853 | ||
| Clear | 1.39 | (0.66–2.94) | |
| Unclear | 1 | – | |
| 2. Description of predictors | 0.2269 | ||
| Clear | 0.63 | (0.30–1.34) | |
| Unclear | 1 | ||
| 3. Description of outcomes | 0.3282 | ||
| Clear | 0.67 | (0.30–1.52) | |
| Unclear | 1 | ||
| 4. Performance measure | 0.9360 | ||
| Reported | 1.03 | (0.48–2.20) | |
| Not reported | 1 | ||
| 5. Information for risk calculation | 0.0289 | ||
| Reported | 2.65 | (1.01–6.96) | |
| Not reported | 1 | ||
| 6. Impact factor | 1.06 | (1.03–1.09) | 0.0002 |