TABLE 1.
Data for urine specimens collected and pooled for the detection of C. trachomatis in an asymptomatically infected male population
| Characteristic | Data for specimens that were:
|
||
|---|---|---|---|
| Tested Individually | Pooled
|
||
| By 5 | By 10 | ||
| No. of urine specimens | 650 | 650 | 650 |
| No. of samples/pool | 5 | 10 | |
| No. of pools | 130 | 65 | |
| No. of C. trachomatis-positive pools | 25 | 23 | |
| No. of C. trachomatis-positive samples | 26 | 26 | 25 |
| Sensitivity (%) | 100 | 96.1 | |
| Specificity (%) | 100 | 100 | |
| Prevalence (%) | 4.0 | 4.2a | 4.3a |
| 95% CI | 2.5–5.8 | 2.5–6.0 | |
| Cost savingsb for: | |||
| Population-based prevalence determination (%) | 80 | 90 | |
| Individual case finding (%) | 60.5 | 54 | |
a
Estimated by p (1).
b
Cost savings estimates are based on the reduced number of tests.