Table 4.
Timing of HIV‐PCR by policy period and HIV transmission
| Total n = 2012 | Period 1 n = 272 | Period 2 n = 1391 | Period 3 n = 349 | |
|---|---|---|---|---|
| At least one HIV‐PCR n (%; 95% CI) | 1794 (89.2; 87.7 to 90.5) | 238 (87.5; 83.0 to 91.2) | 1242 (89.3; 87.5 to 90.9) | 313 (89.7; 86.0 to 92.7) |
| Single HIV‐PCR onlya n (%; 95% CI) | 1149 (64.0; 61.8 to 66.3) | 182 (76.5; 70.6 to 81.7) | 829 (66.7; 64.0 to 69.4) | 138 (44.1; 38.5 to 49.8) |
| Age at first PCR, weeks median (IQR) | 6.0 (0.1 to 6.6) | 6.3 (6.0 to 6.9) | 6.1 (0.1 to 6.6) | 0.1 (0 to 6.1) |
| Birth HIV‐PCR present n (%;95% CI) | 667 (37.2; 34.9 to 39.5) | 28 (11.8;0.1 to 16.6) | 428 (34.5;31.8 to 37.2) | 211 (67.4;61.9 to 72.8) |
| Six to ten weeks HIV‐PCR presenta n (%; 95% CI) | 1578 (88.6;87 to 90) | 221 (93.2;89.3 to 96.1) | 1106 (89.8;88 to 91.5) | 251 (80.2;75.3 to 84.5) |
| Follow‐up HIV‐PCR ever after birth testa n (%) | 526 (78.8; 75.6 to 81.9) | 21 (75;55.1 to 89.3) | 337 (78.7;74.6 to 82.5) | 168 (79.6; 73.5 to 84.8) |
| Age F/U HIV‐PCRa, weeks median (IQR) | 6.5 (6.1 to 8.3) | 6.3 (6.1 to 6.6) | 6.4 (6.0 to 7.1) | 8.6 (6.4 to 10.7) |
| HIV‐PCR positive ever n(%; 95% CI) | 32 (1.8; 1.2 to 2.5) | 1 (0.4;0.01 to 2.3) | 25 (2.0; 1.3 to 3.0) | 6 (1.9; 0.7 to 4.1) |
| Overall transmission rate | 1.8 | 0.4 | 2.0 | 1.9 |
| In utero transmission rate (95% CI) | 1.7 (0.8 to 2.9) | 3.6 (0.1 to 19) | 2.3 (1.1 to 4.3) | 0 |
| Transmission rate at six to ten weeksa (95% CI) | 0.6 (0.3 to 1.0) | 0 | 0.5 (0.1 to 1.1) | 2.3 (0.9 to 5.1) |
| Median (IQR) age HIV‐PCR positive, weeks | 6.4 (0.4 to 40) | 0.1 | 6.0 (0.1 to 40.1) | 6.8 (6.4 to 12) |
a
Denominator excludes those with positive birth HIV‐PCR.