Table 2 Number, age and sex of derivation and validation cohorts: patients with CWS and whole study population at baseline
From: Development and validation of a clinical prediction rule for chest wall syndrome in primary care
Study | Baseline characteristics | CWS patients | Study population |
|---|---|---|---|
Derivation cohort | Number of patients (%) | 284 (44.1) | 644 (100.0) |
Mean age (range), years | 50.5 (18–90) | 55.4 (18–95) | |
Sex : male patients, number (%) | 136 (47.9) | 307 (47.7) | |
Validation cohort | Number of patients (%) | 565 (46.6) | 1212 (100.0) |
Mean age (range), years | 58 (35–90) | 59 (35–93) | |
Sex: male patients, number (%) | 235 (41.6) | 534 (44.1) |