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Table 4 Asthma-related drugs and examinations usage of children in different age groups, regions and city grades (N, %)

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

  Total Children younger than 3 years old Preschool children School-age children P East China Central China West China P 1st tier city 2nd tier city 3rd tier city 4th and 5th Tier city P
Total Number 378 (100%) 66 (17.46%) 129 (34.13%) 183 (48.41%)   320 (84.66%) 14 (3.70%) 44 (11.64%)   89 (23.54%) 232 (61.83%) 22 (5.82%) 35 (9.26%)  
Medication
 Asthma medications 240 (63.49%) 60 (90.91%) 83 (64.34%) 97 (53.01%) < 0.01 218 (68.13%) 14 (100%) 8 (18.18%) < 0.01 59 (66.29%) 143 (61.64%) 18 (81.82%) 20 (57.14%) < 0.01
 Antibiotics 190 (50.26%) 42 (63.64%) 61 (47.29%) 87 (47.54%) 0.06 154 (48.13%) 14 (100%) 22 (50%) < 0.01 23 (25.84%) 128 (55.17%) 12 (54.55%) 27 (77.14%) < 0.01
 Antiallergics 84 (22.22%) 8 (12.12%) 33 (25.58%) 43 (23.50%) 0.09 74 (23.13%) 4 (28.57%) 6 (13.64%) 0.31 32 (35.96%) 35 (15.09%) 10 (45.45%) 7 (20.00%) < 0.01
Examination
 Blood test 115 (30.42%) 28 (42.42%) 41 (31.78%) 46 (25.14%) 0.03 90 (28.13%) 9 (64.29%) 16 (36.36%) 0.01 18 (20.22%) 74 (31.90%) 6 (27.27%) 17 (48.57%) 0.02
 Pulmonary function test 46 (12.17%) 1 (1.52%) 10 (7.75%) 35 (19.13%) < 0.01 42 (13.13%) 1 (7.14%) 3 (6.82%) 0.41 18 (20.22%) 24 (10.34%) 1 (4.55%) 3 (8.57%) 0.08
 Allergen test 22 (5.82%) 2 (3.03%) 13 (10.08%) 7 (3.83%) 0.03 19 (5.94%) 3 (21.43%) 0.10 7 (7.87%) 13 (5.60%) 2 (5.71%) 0.73
 Radiology 31 (8.20%) 13 (19.70%) 10 (7.75%) 8 (4.37%) < 0.01 17 (5.31%) 6 (42.86%) 8 (18.18%) < 0.01 1 (1.12%) 19 (8.19%) 3 (13.64%) 8 (22.86%) < 0.01