Comorbidity measures before and after hip surgery
| Variables | Total before, N (%) | Total after, N (%) | Total new 24 months after, N (%) | P values |
| Any mental health disorder | 372 (19.9) | 685 (36.6) | 391 (26.1) | <0.001 |
| PTSD | 67 (3.6) | 167 (8.9) | 119 (6.6) | <0.001 |
| Chronic pain | 174 (9.3) | 463 (24.8) | 374 (22.1) | <0.001 |
| Substance abuse disorder | 288 (15.4) | 453 (24.2) | 248 (15.7) | <0.001 |
| Cardiovascular disease | 198 (10.6) | 339 (18.1) | 195 (11.7) | <0.001 |
| Metabolic syndrome | 297 (15.9) | 552 (29.5) | 341 (21.7) | <0.001 |
| Systemic arthropathy | 34 (1.8) | 79 (4.2) | 60 (3.3) | <0.001 |
| Any sleep disorder | 256 (13.7) | 541 (28.9) | 370 (22.9) | <0.001 |
| Insomnia | 165 (8.8) | 333 (17.8) | 248 (14.5) | <0.001 |
| Breathing-related sleep disorder (apnea) | 93 (5.0) | 268 (14.3) | 201 (11.3) | <0.001 |
| Any comorbidity | 973 (52.0) | 1347 (72.0) | 480 (53.5) | <0.001 |
P value based on new cases after surgery compared with cases present in the sample before surgery. New diagnosis 24 months after calculated from total without the condition prior to surgery (bolded values are significant at p<0.05).
PTSD, post-traumatic stress disorder.