Table 1.
The proportion of respiratory infections and outpatient visits from January to April in 2018-2020
| Categories | 2018 | 2019 | 2020 | p |
|---|---|---|---|---|
| Age median (IQR) (years) | 2 (0, 4) | 2 (1, 4) | 2 (1, 5) | < 0.001 |
| Age ( n, %) | ||||
| ≤ 3 (toddlers and infants) | 247,538(71.0) | 189,036 (64.8) | 80,247 (67.1) | < 0.001 |
| >3–6 (preschool children) | 67,261 (19.3) | 68,241 (23.4) | 24,018 (20.1) | |
| ≥ 6–18 ( school students) | 33,963(9.7) | 34,280 (11.8) | 15,267 (12.8) | |
| Gender ( n, %) | ||||
| Male | 197,058 (56.5) | 162,112 (55.6) | 65,245 (54.6) | < 0.001 |
| Female | 151,704 (43.5) | 129,445 (44.4) | 54,287 (45.4) | |
| Respiratory tract infection (n/N, %) | ||||
| Upper respiratory tract infection |
176,672/348,762 (50.7) |
139,481/291,557 (47.8) | 6413/119,532 (5.4) | < 0.001 |
| Lower respiratory tract infection | 172,090/348,762 (49.3) | 152,076/291,557 (52.2) | 113,119/119,532 (94.6) | |
| Patients with respiratory tract infection /outpatient visits n/N (%) | ||||
| January | 123,861/315,685(39.2) | 94,862/266,190 (35.6) | 91,911/241,251 (38.1) | < 0.001 |
| February | 83,448/227,398(36.7) | 51,400/177,377 (29.0) | 9093/43,306 (20.1) | < 0.001 |
| March | 72,383/243,546(29.7) | 62,017/217,870 (28.5) | 9137/108,989 (8.4) | < 0.001 |
| April | 69,070/247,039(28.0) | 83,278/281,457 (29.6) | 9391/135,708 (6.9) | < 0.001 |
| Total | 348,762/1,033,668(33.7) | 291,557/942,894 (30.9) | 119,532/529,254 (22.6) | < 0.001 |
IQR interquartile range; p < 0.05 was considered statistically different