The impact of influenza on the health related quality of life in China: an EQ-5D survey

BMC Infectious Diseases

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)
Weighted^b	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)
Weighted^b	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

ISSN: 1471-2334