Table. Demographics of study participants for spatiotemporal evolution of SARS-CoV-2 Alpha and Delta variants during large nationwide outbreak of COVID-19, Vietnam, 2021*.
Characteristic | No. sequences, n = 1,303 | Alpha, n = 74 | AY.57, n = 1,212 |
---|---|---|---|
Age, y | |||
Median (Q1‒Q3) | 43 (29‒61) | 35 (30–55) | 44 (29‒61) |
Missing |
38 (2.9) |
31 (41.9) |
2 (0.2) |
Sex | |||
M | 689 (52.9) | 22 (29.7) | 661 (54.5) |
F | 578 (44.4) | 21 (28.4) | 551 (45.5) |
Unknown |
36 (2.8) |
31 (41.9) |
|
Region | |||
Central | 120 (9.2) | 24 (32.4) | 94 (7.8) |
Northern | 504 (38.7) | 44 (59.5) | 450 (37.1) |
Southern | 679 (52.1) | 6 (8.1) | 668 (55.1) |
*Values are no. (%) unless indicated otherwise. Characteristics of A.23.1 variant‒infected cases were previously reported (7). Q, quartile.