The prevalence and SRR for CHD and chronic hypertension in RF positive and RF negative subgroups
| RF+ (n=4650) | RF− (n=2559) | |||
|---|---|---|---|---|
| n | SRR (95% CI) | n | SRR (95% CI) | |
| CHD | 355 | 1.08 (0.97 to 1.19) | 198 | 1.15 (1.00 to 1.32) |
| Chronic hypertension | 846 | 0.97 (0.90 to 1.04) | 537 | 1.19 (1.10 to 1.30) |
CHD, coronary heart disease; RF, rheumatoid factor; SRR, standardised rate ratio.