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Table 2 Demographic characteristics

From: The economic burden of medical treatment of children with asthma in China

Variable Total Children younger than 3 years old Preschool children School-age children P
Total Number, n (%) 2468 (100%) 439 (17.79%) 967 (39.18%) 1062 (43.03%)  
Average age (year), mean ± SD 5.50 ± 3.32 1.36 ± 0.34 3.92 ± 0.80 8.66 ± 2.35  
Sex, n (%)
 Male 1575 (63.82%) 300 (68.34%) 594 (61.43%) 681 (64.12%) 0.04
 Female 893 (36.18%) 139 (31.66%) 373 (38.57%) 381 (35.88%)  
Visits, n (%)
 Outpatient 70,570 (98.58%) 14,419 (98.11%) 32,722 (98.76%) 23,429 (98.63%) < 0.01
 Inpatient 1014 (1.42%) 278 (1.89%) 411 (1.24%) 325 (1.37%)  
Hospital grade, n (%)
 Advanced 44,440 (62.08%) 9304 (63.31%) 20,325 (61.34%) 14,811 (62.35%) < 0.01
 Mid-level 13,686 (19.12%) 2582 (17.57%) 6808 (20.55%) 4296 (18.09%)  
 Primary 13,433 (18.77%) 2811 (19.13%) 5994 (18.09%) 4628 (19.48%)  
Hospitals type, n (%)
 General 51,731 (72.27%) 8554 (58.20%) 24,147 (72.88%) 19,030 (80.11%) < 0.01
 Specialized 19,828 (27.70%) 6143 (41.80%) 8980 (27.10%) 4705 (19.81%)  
Regions, n (%)
 East 1900 (76.99%) 352 (80.18%) 756 (78.18%) 792 (74.58%) < 0.01
 Central 223 (9.04%) 44 (10.02%) 97 (10.03%) 82 (7.72%)  
 West 345 (13.98%) 43 (9.79%) 114 (11.79%) 188 (17.70%)  
City Grades, n (%)
 First Tier 601 (24.35%) 74 (16.86%) 246 (25.44%) 281 (26.46%) < 0.01
 Second Tier 1268 (51.38%) 289 (65.83%) 522 (53.98%) 457 (43.03%)  
 Third Tier 195 (7.90%) 29 (6.61%) 77 (7.96%) 89 (8.38%)  
 Fourth and fifth Tier 314 (12.72%) 47 (10.71%) 122 (12.62%) 145 (13.65%)