Table 2.
Health-related quality of life of influenza outpatients and inpatients
| n | VAS | Health utility | QALD loss a | ||||
|---|---|---|---|---|---|---|---|
| Mean (SD) | Median (IQR) | Mean (SD) |
Median (IQR) |
Mean (SD) |
Median (IQR) |
||
| Influenza outpatient | |||||||
| Unweighted | 529 | 68.93 (19.08) | 70.00 (60.00, 80.00) | 0.6142 (0.2006) | 0.6430 (0.5630, 0.7350) | 1.62 (1.84) | 1.08 (0.46, 2.04) |
| Weightedb | 529 | 68.20 (35.98) | 66.18 (42.05, 87.34) | 0.6087 (0.3518) | 0.5678 (0.3333, 0.7532) | 1.69 (2.52) | 0.94 (0.39, 1.94) |
| Influenza inpatient | |||||||
| Unweighted | 249 | 65.94 (20.61) | 70.00 (50.00, 80.00) | 0.5851 (0.2197) | 0.6430 (0.4770, 0.7290) | 3.51 (4.25) | 2.17 (1.00, 4.45) |
| Weightedb | 249 | 64.07 (29.03) | 60.83 (43.45, 78.22) | 0.5616 (0.2799) | 0.5588 (0.3846, 0.6925) | 3.63 (5.53) | 2.03 (0.80, 3.93) |
a QALD: quality-adjusted life days
b Weighted: Previous analysis showed that population structure (by age group and levels of hospitals) of included patients was significantly different from that of other influenza patients from the National ILI Surveillance Network [Additional file 4: Table S1]. Hence we calculated the weighted HRQoL of included patients using the population structure of the National ILI Surveillance Network as a reference