Table 3 Correlates of DBS specimens genotyping failure
Factor | Genotyping failure n (%) | Odds ratio (95% CI) | p-value | Adjusted OR [aOR (95% CI)] | p-value |
|---|---|---|---|---|---|
Pre-genotyping viral load testing | |||||
 Not done | 1038/1885 (55.1) | 1 | < 0.0001 |  | 0.001 |
 Done | 888/1952 (45.5) | 0.68 (0.6–0.77) |  | 0.71 (0.16–0.22) |  |
Viral load | |||||
 1000–10,000 cps/mL | 599/897 (66.8) | 1 | < 0.0001 |  | < 0.0001 |
 > 10,000–50,000 cps/mL | 185/497 (37.2) | 0.29 (0.23–0.37) | 0.3 (0.24–0.38) | ||
 > 50,000–200,000 cps/mL | 73/344 (21.2) | 0.13 (0.11–0.18) | 0.14 (0.10–0.18) | ||
 > 200,000 cps/mL | 31/214 (14.5) | 0.08 (0.06–0.13) | 0.07 (0.06–0.13) | ||
Specimen source | |||||
 Research studies | 48/137 (35.0) | 1 | < 0.0001 |  | 0.006 |
 Routine clinical diagnosis | 1574/3279 (48.0) | 1.72 (1.36–2.18) | 1.4 (1.11–1.84) | ||