Para-clinical findings | Wave 1 | Wave 2 | Wave 3 | Wave 4 | Wave 5 | P value |
---|---|---|---|---|---|---|
n, % (95% CI) | n, % (95% CI) | n, % (95% CI) | n, % (95% CI) | n, % (95% CI) | ||
PaO2 sat < 93 | 27445, 59.3 (58.7–59.8) | 7970, 47.7 (46.4–48.7) | 24867, 43.5 (42.8–44.1) | 29695, 40.4 (39.8–40.9) | 109105, 81.0 (80.7–81.2) |  < 0.001 |
PCR test result | Â | Â | Â | Â | Â | Â |
 Positive | 11000, 23.8 (23.0–24.5) | 6592, 39.4 (38.2–40.5) | 25743, 45.0 (44.3–45.6) | 39500, 53.7 (53.2–54.1) | 62236, 49.4 (49.0–49.7) |  < 0.001 |
 Inconclusive | 23112, 49.9 (49.2–50.5) | 5112, 30.6 (29.3–31.8) | 17126, 30.0 (29.3–30.6) | 23256, 31.6 (31.0–32.1) | 45071, 35.7 (35.2–36.1) | |
 Negative | 12159, 26.3 (25.5–27.0) | 5010, 30.0 (28.7–31.2) | 14277, 25.0 (24.2–25.7) | 10802, 14.7 (14.0–15.3) | 18793, 14.9 (14.3–15.4) | |
Positive findings in Chest CT | 13937, 30.1 (29.3–30.8) | 10958, 65.6 (64.7–66.4) | 40210, 70.4 (69.9–70.8) | 56450, 76.7 (76.3–77.0) | 99886, 74.1 (73.8–74.3) |  < 0.001 |
ICU admission | 6773, 14.7 (13.8–15.5) | 2943, 17.6 (16.2–18.9) | 10763, 18.8 (18.0–19.5) | 10786, 14.7 (14.0–15.3) | 13578, 10.1 (9.5–10.6) |  < 0.001 |
Death | 4546, 9.8 (8.9–10.6) | 2187, 13.1 (11.6–14.5) | 9000, 15.7 (14.9–16.4) | 5793, 7.9 (7.2–8.5) | 5305, 3.9 (3.3–4.4) |  < 0.001 |