Crude and adjusted HRs for rotor cuff tear (RCT) between the autoimmune connective tissue disease (ACTD) and non-ACTD cohorts during the 7-year follow-up period, starting from the index date of an ambulatory care visit (n=30 114)
| Presence of RCT | Non-ACTD controls | Patients with ACTDs |
| 7-year follow-up period | ||
| Yes/Total | 37/25 095 | 12/5019 |
| Person-years | 154 275 | 24 536 |
| Incidence per 100 000 person-years | 24 | 49 |
| Crude HR (95% CI) | 1.00 | 2.08* (1.08 to 4.02) |
| Adjusted HR† (95% CI) | 1.00 | 1.97* (1.01 to 3.82) |
*indicates p<0.05.
†The propensity score was adjusted according to age, sex, income, diabetes mellitus, hypertension, hyperlipidaemia, coronary heart disease, fracture, thyroid, gout and Parkinson’s disease.
RCT, rotor cuff tear.