Table 3.
Measuring Associations Between Potential Epidemiological Factors and RDT False-Positivity
| Variable | Results, No. (%) | OR (95% CI) | aOR (95% CI) | |
|---|---|---|---|---|
| False- Positive (n = 60) |
True- Positive (n = 125) | |||
| Health facility testing volume during study period, No. of RDTs | ||||
| ≤2 | 1 (25.0) | 3 (75.0) | 1.00 (Reference) | NA |
| >2 and ≤ 9 | 5 (35.7) | 9 (64.3) | 1.67 (.13–20.58) | |
| >9 and ≤30 | 22 (48.9) | 23 (51.1) | 2.87 (.28–29.71) | |
| >30 | 32 (26.2) | 90 (73.8) | 1.07 (.11–10.63) | |
| Health facility positive volume, No. of RDT-positive samples during study period | ||||
| 1 | 4 (57.1) | 3 (42.9) | 1.00 (Reference) | NA |
| 2 | 2 (20.0) | 8 (80.0) | 0.19 (.02–1.62) | |
| 3–6 | 9 (52.9) | 8 (47.1) | 0.84 (.14–4.97) | |
| 9–64 | 45 (35.7) | 81 (64.3) | 0.42 (.09–1.94) | |
| Transmission season | ||||
| January–April | 31 (27.0) | 84 (73.0) | 1.00 (Reference) | 1.64 (.86–3.14) |
| May–December | 29 (41.4) | 41 (58.6) | 1.92 (1.02–3.60) | |
| Transmission year | ||||
| 2012–2013 | 13 (19.7) | 53 (81.3) | 1.00 (Reference) | 2.41 (1.17–4.97) |
| 2013–2014 | 40 (39.5) | 72 (60.5) | 2.66 (1.30–5.41) | |
Abbreviations: aOR, adjusted odds ratio; CI, confidence interval; NA, not applicable; OR, odds ratio; RDT, rapid diagnostic test.