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Table 1 Characteristics of included influenza patients in the health-related quality of life survey, China, 2013 (n, %)

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

Characteristics Influenza outpatients
(n = 529)
Influenza inpatients
(n = 249)
Total
(n = 778)
Median age, years (IQR) a 8 (5–20) 4 (2–7) 7 (3–15)
Age group, years
 < 5 122 (23.1%) 141 (56.6%) 263 (33.8%)
 5–15 246 (46.5%) 80 (32.1%) 326 (41.9%)
 16–59 146 (27.6%) 24 (9.6%) 170 (21.9%)
 ≥ 60 15 (2.8%) 4 (1.6%) 19 (2.4%)
Male 281 (53.1%) 144 (57.8%) 425 (54.6%)
Risk status b
 Low-risk 412 (77.9%) 118 (47.4%) 530 (68.1%)
 High-risk 117 (22.1%) 131 (52.6%) 248 (31.9%)
Area
 Urban area 438 (82.8%) 166 (66.7%) 604 (77.6%)
 Rural area 91 (17.2%) 83 (33.3%) 174 (22.4%)
Region
 East China 271 (51.2%) 113 (45.4%) 384 (49.4%)
 Central China 122 (23.1%) 78 (31.3%) 200 (25.7%)
 West China 136 (25.7%) 58 (23.3%) 194 (24.9%)
Hospital c
 Level 3 298 (56.3%) 177 (69.7%) 475 (60.7%)
 Level 2 119 (22.5%) 58 (22.8%) 177 (22.6%)
 Level 1 and lower 112 (21.2%) 19 (7.5%) 131 (16.7%)
Virus type
 Untyped d 307 (58.0%) 183 (73.5%) 490 (63.0%)
 Influenza A 164 (31.0%) 30 (12.0%) 194 (24.9%)
 Influenza B 58 (11.0%) 36 (14.5%) 94 (12.1%)
  1. a IQR: inter-quartile range
  2. b Risk status: high risk patients refer to those with underlying medical conditions including: chronic respiratory disease, asthma, chronic cardiovascular diseases, diabetes, chronic liver disease, and chronic renal disease, etc. Other patients without these underlying diseases are low risk patients
  3. c Level 3 is the top level, followed by level 2 and level 1 in order
  4. d Untyped: Laboratory tests for influenza virus type identification were not conducted