Table 2.
Results from pulse oximeter probe prototype testing in Malawi, Bangladesh, and the UK according to expert and HCW
| Testing round | Total SpO2 tests | Quality SpO2 < 1 minute, n (%) | 95% CI | Quality SpO2 < 2 minutes, n (%) | 95% CI | Quality SpO2 < 5 minutes, n (%) | 95% CI | Median time in seconds (IQR) | |
|---|---|---|---|---|---|---|---|---|---|
| Cumulative | Overall | 1,307 | 876 (67%) | 64%, 70% | 1,059 (81%) | 79%, 83% | 1,181 (90%) | 89%, 92% | 29.5 (17.6–61.5) |
| Expert | 689 | 470 (68%) | 65%, 72% | 584 (85%) | 82%, 87% | 660 (96%) | 94%, 97% | 32.0 (18.4–66.0) | |
| HCW | 618 | 406 (66%) | 62%, 69% | 475 (77%) | 73%, 80% | 521 (84%) | 81%, 87% | 26.0 (16.8–55.4) | |
| Round 1 (Malawi) | Overall | 416 | 287 (69%) | 64%, 73% | 337 (81%) | 77%, 85% | 375 (90%) | 87%, 93% | 25.3 (16.1–55.3) |
| Expert | 211 | 147 (70%) | 63%, 76% | 176 (83%) | 78%, 88% | 200 (95%) | 91%, 97% | 24.8 (16.2–64.6) | |
| HCW | 205 | 140 (68%) | 61%, 75% | 161 (79%) | 72%, 84% | 175 (85%) | 80%, 90% | 25.3 (15.6–49.9) | |
| Round 2 (Bangladesh) | Overall | 400 | 255 (64%) | 59%, 68% | 323 (81%) | 77%, 84% | 345 (86%) | 82%, 89% | 35.0 (20.6–60.8) |
| Expert | 198 | 135 (68%) | 61%, 75% | 181 (91%) | 87%, 95% | 198 (100%) | 98%, 100% | 42.0 (23.4–66.0) | |
| HCW | 202 | 120 (59%) | 52%, 66% | 142 (70%) | 63%, 77% | 147 (73%) | 66%, 79% | 29.0 (19.0–48.0) | |
| Round 3 (UK) | Overall | 430 | 297 (69%) | 64%, 73% | 351 (82%) | 78%, 85% | 400 (93%) | 90%, 95% | 26.8 (15.4–62.4) |
| Expert | 219 | 151 (69%) | 62%, 75% | 179 (82%) | 76%, 87% | 201 (92%) | 87%, 95% | 27.6 (16.1–59.3) | |
| HCW | 211 | 146 (69%) | 62%, 75% | 172 (82%) | 76%, 87% | 199 (94%) | 90%, 97% | 26.3 (14.7–64.2) | |
| Round 4 (Malawi–expert only) | Overall | 61 | 37 (61%) | 47%, 73% | 48 (79%) | 66%, 88% | 61 (100%) | 94%, 100% | 46.0 (22.0–100.0) |
CI = confidence interval; HCW = health-care worker; IQR = interquartile range; SpO2 = peripheral oxyhemoglobin saturation; UK = United Kingdom.