Calculation of retrospective consistent condom use rates by female sex workers (FSWs) with occasional clients in Chennai, integrated biological and behavioural assessments cross-sectional survey 2006
| Numerator: no of FSWs consistently using condoms by year | |||||
| No years | No using | Cumul. | No using condoms for: | → No: | → No using condoms in: |
| 0 (<1) | 41 | 41 | ≥1 years (317–41) | 276 | 2005 |
| 1 (<2) | 136 | 177 | ≥2 years (317–177) | 140 | 2004 |
| 2 (<3) | 70 | 247 | ≥3 years (317–247) | 70 | 2003 |
| 3 (<4) | 38 | 285 | ≥4 years (317–285) | 32 | 2002 |
| 4 (<5) | 16 | 301 | ≥5 years (317–301) | 16 | 2001 |
| Current | 317 | – | Currently: | 317 | 2006 |
| Denominator: no of FSWs practising sex work each year | |||||
| No years | No sex work | Cumul. | No doing sex work for: | → No: | → No doing sex work in: |
| 0 (<1) | 13 | 13 | ≥1 years (348–13) | 335 | 2005 |
| 1 (<2) | 39 | 52 | ≥2 years (348–52) | 296 | 2004 |
| 2 (<3) | 76 | 128 | ≥3 years (348–128) | 220 | 2003 |
| 3 (<4) | 45 | 173 | ≥4 years (348–173) | 175 | 2002 |
| 4 (<5) | 39 | 212 | ≥5 years (348–212) | 136 | 2001 |
| Current | 348 | — | Currently: | 348 | 2006 |
| Proportion of FSWs using condoms consistently by year | |||
| Year | No using condoms | No doing sex work | Percentage using condoms |
| 2001 | 16 | 136 | 11.8 |
| 2002 | 32 | 175 | 18.3 |
| 2003 | 70 | 220 | 31.8 |
| 2004 | 140 | 296 | 47.3 |
| 2005 | 276 | 335 | 82.4 |
| 2006 | 317 | 348 | 91.1 |