Hand hygiene events by hospital, measured using group electronic hand hygiene monitoring system, and COVID-19 patient-days
| Hospital | Baseline (Nov. 1, 2019–Feb. 29, 2020) | Pre-peak (Mar. 1–Apr. 24, 2020) | Post-peak (Apr. 25–July 5, 2020) | IRR (95% CI)* | Patient-days (maximum bed census)† | |||
|---|---|---|---|---|---|---|---|---|
| No. of HH opportunities | No. (%) of HH events | No. of HH opportunities | No. (%) of HH events | No. of HH opportunities | No. (%) of HH events | |||
| 1 | 3 784 445 | 2 043 422 (54.0) | 1 335 290 | 1 057 932 (79.2) | 1 972 242 | 1 422 267 (72.1) | 1.467 (1.464–1.471) | 1250 (24) |
| 2 | 1 756 196 | 770 695 (43.9) | 736 718 | 424 965 (57.7) | 1 093 721 | 472 466 (43.2) | 1.314 (1.310–1.319) | 846 (36) |
| 3 | 991 155 | 226 530 (22.9) | 364 609 | 161 631 (44.3) | 537 770 | 170 035 (31.6) | 1.940 (1.927–1.952) | 1427 (34) |
| 4 | 565 189 | 131 557 (23.3) | 176 885 | 79 958 (45.2) | 245 002 | 76 319 (31.2) | 1.942 (1.925–1.959) | 215 (11) |
| 5 | 566 904 | 255 363 (45.0) | 262 389 | 173 352 (66.1) | 409 390 | 239 565 (58.5) | 1.467 (1.458–1.476) | 4588 (84) |
| 6 | 1 186 495 | 492 062 (41.5) | 438 997 | 304 884 (69.5) | 592 434 | 345 649 (58.3) | 1.675 (1.667–1.682) | 2268 (47) |
| 7 | 1 616 146 | 808 862 (50.0) | 647 672 | 448 435 (69.2) | 783 123 | 501 270 (64.0) | 1.383 (1.378–1.388) | 868 (21) |
| 8 | 220 249 | 108 022 (49.0) | 77 008 | 60 489 (78.5) | 56 919 | 47 480 (83.4) | 1.602 (1.586–1.618) | 1515 (35) |
| 9 | 1 877 432 | 1 101 387 (58.7) | 624 400 | 517 998 (83.0) | 853 476 | 635 549 (74.5) | 1.414 (1.409–1.419) | 734 (17) |
| 10 | 419 724 | 173 564 (41.4) | 187 240 | 145 737 (77.8) | 223 312 | 165 288 (74.0) | 1.882 (1.869–1.895) | 1920 (38) |
| 11 | 498 056 | 170 078 (34.1) | 196 217 | 116 608 (59.4) | 273 144 | 115 411 (42.3) | 1.740 (1.727–1.753) | 123 (3) |
| 12 | 268 977 | 43 859 (16.3) | 96 811 | 33 784 (34.9) | 117 783 | 42 152 (35.8) | 2.140 (2.110–2.171) | 0 |
| Total | 13 750 968 | 6 325 401 (46.0) | 5 144 236 | 3 525 773 (68.5) | 7 158 316 | 4 233 451 (59.1) | 1.490 (1.488–1.492) | 15 754 |
Note: CI = confidence interval, HH = hand hygiene, IRR = incidence rate ratio.
↵* Baseline to pre-peak of the first pandemic wave.
↵† The aggregate number of days that patients with laboratory-confirmed SARS-CoV-2 infections were managed in additional precautions and the maximum census of patients with SARS-CoV-2 infections in precautions on the same day, between Mar. 1 and July 5, 2020.