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Total number of tests, positivity rates, number of first tests, and prevalence at first test among the women in the cohort
| 1990–93 | 1994–96 | 1997–99 | 2000–03 | 2004–05 | |
|---|---|---|---|---|---|
| All tests | |||||
| Total number of tests | 13,134 | 16,741 | 18,991 | 30,020 | 14,203 |
| Proportion of positive tests | 7.3% | 6.2% | 5.0% | 6.2% | 5.6% |
| Restricted to first test for each woman | |||||
| Number of first tests | 6,761 | 4,588 | 4,480 | 6,049 | 3,069 |
| Prevalence at first test | 8.0% | 7.6% | 5.9% | 8.2% | 7.6% |
