Univariate analysis
| Variables | p Value | RR | 95% CI |
|---|---|---|---|
| ARF, acute rheumatic fever; CI, confidence interval; RR, relative risk. | |||
| Family income ⩽3 × minimum wage | 0.26 | 1.52 | 0.74 to 3.12 |
| Mother’s schooling <4 years | 0.09 | 1.77 | 0.91 to 3.46 |
| Absence of chorea | 0.13 | 0.39 | 0.12 to 1.32 |
| Weight at registration <10 centile | 0.70 | 0.87 | 0.43 to 1.75 |
| Non-white | 0.17 | 1.78 | 0.78 to 4.03 |
| ARF recurrence | 0.0010 | 3.00 | 1.56 to 5.77 |
| Moderate or severe carditis | <0.0001 | 12.79 | 4.91 to 33.32 |