Point prevalence rate of RA in nine consecutive surveys of the Kamitonda population
| 1965 | 1969 | 1972 | 1975 | 1980 | 1985 | 1988 | 1992 | 1996 | trend | |
|---|---|---|---|---|---|---|---|---|---|---|
| Total | ||||||||||
| Number of RA cases | 5 | 10 | 7 | 7 | 8 | 9 | 6 | 6 | 6 | |
| Crude prevalence2-150 | 2.1 | 4.7 | 3.1 | 3.0 | 3.5 | 3.5 | 2.1 | 2.1 | 2.0 | |
| Adjusted prevalence2-150 ‡ | 2.4 | 5.4 | 3.7 | 3.4 | 3.7 | 3.2 | 2.0 | 2.0 | 1.7 | p<0.1 (χ2=3.58) |
| (95% CI) | (0.3, 4.4) | (2.0, 8.7) | (1.0, 6.4) | (0.9, 6.0) | (1.1, 6.3) | (1.1, 5.3) | (0.4, 3.6) | (0.4, 3.6) | (0.3, 3.1) | |
| Men | ||||||||||
| Number of RA cases | 0 | 2 | 2 | 1 | 2 | 3 | 2 | 3 | 2 | |
| Crude prevalence2-150 | 0.0 | 2.0 | 1.8 | 0.9 | 1.8 | 2.4 | 1.5 | 2.2 | 1.4 | |
| Adjusted prevalence2-150 † | 0.0 | 2.5 | 2.3 | 1.1 | 2.2 | 2.0 | 1.1 | 1.7 | 1.1 | p>0.5 (χ2=0.13) |
| (95% CI) | (NC) | (0, 6.0) | (0, 5.5) | (0, 3.4) | (0, 5.3) | (0, 4.3) | (0, 2.7) | (0, 3.6) | (0, 2.6) | |
| Women | ||||||||||
| Number of RA cases | 5 | 8 | 5 | 6 | 6 | 6 | 4 | 3 | 4 | |
| Crude prevalence2-150 | 4.3 | 7.0 | 4.3 | 5.1 | 5.1 | 4.5 | 2.7 | 2.0 | 2.5 | |
| Adjusted prevalence2-150 † | 4.6 | 8.2 | 5.1 | 5.7 | 5.1 | 4.4 | 2.8 | 2.3 | 2.4 | p<0.025 (χ2=5.92) |
| (95% CI) | (0.6, 8.7) | (2.5, 13.8) | (0.6, 9.5) | (1.1, 10.2) | (0.9, 9.2) | (0.8, 7.9) | (0, 5.6) | (0, 4.8) | (0.1, 4.7) | |
↵2-150 per 1000 persons, †adjusted for age, ‡adjusted for age and sex, CI: confidence intervals, NC: not calculated.