Cause-specific mortality among subjects with and without rheumatoid arthritis, Iowa Women’s Health Study, 1986–2000. Results are shown as No (% of total at risk)
| Cause of death* | Patients† (n=156) | Non-patients (n=31056) | Relative risk‡ (95% CI) |
|---|---|---|---|
| *Infections include conditions with ICD-9 (or ICD-10 equivalent) codes of 001–139, 320–322, 480–487. Malignant neoplasms include ICD-9 codes 140–208, while diseases of the circulatory system include ICD-9 codes 390–459. | |||
| †Subjects were excluded from the analysis if data for ICD-9 code were missing (two patients and 122 non-patients). | |||
| ‡Calculated using Cox proportional hazards regression (multivariable adjustments for comorbidity, education, smoking history, alcohol use, body mass index, and daily decaffeinated coffee consumption). | |||
| Infection | 2 (1) | 106 (0.3) | 3.61 (0.89 to 14.69) |
| Diseases of the circulatory system | 9 (6) | 1254 (4.0) | 1.46 (0.76 to 2.81) |
| Malignant neoplasm | 8 (5) | 1380 (4.4) | 0.97 (0.46 to 2.04) |
| Other | 9 (6) | 784 (2.5) | – |