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Table 1 Patient characteristics according to iron deficiency anemia

From: Association between atopic disease and anemia in pediatrics: a cross-sectional study

 Frequency (%)Crude OR (95% CI)P value
No anemia N = (827,124)IDA
(N = 19,594)
Age8.97 (5.16)a5.98 (5.48)a0.89 (0.89–0.89)<.001
Sex
 Male428,361 (51.79)9253 (47.22)1 [Reference] 
 Female398,763 (48.21)10,341 (52.78)1.20 (1.17–1.24)<.001
Insurance Types
 Health insurance806,892 (97.55)19,054 (97.24)1 [Reference] 
 Medical aid20,232 (2.45)540 (2.76)1.13 (1.04–1.23)0.006
Systemic infection
 Meningitis1645 (0.20)130 (0.66)3.35 (2.80–4.01)<.001
 BJI803 (0.10)41 (0.21)2.16 (1.58–2.96)<.001
 Sepsis3071 (0.37)478 (2.44)6.71 (6.09–7.40)<.001
 HEP2445 (0.30)695 (3.55)12.40 (11.39–13.51)<.001
 CKD57 (0.01)26 (0.13)19.28 (12.12–30.67)<.001
Mental disorder
 Depression3931 (0.48)178 (0.91)1.92 (1.65–2.23)<.001
 Anxiety6518 (0.79)309 (1.58)2.02 (1.80–2.26)<.001
Chronic inflammation
 PUD15,248 (1.84)640 (3.27)1.80 (1.66–1.95)<.001
 COPD12,650 (1.53)422 (2.15)1.42 (1.29–1.56)<.001
 SLE228 (0.03)26 (0.13)4.83 (3.22–7.25)<.001
 RA1454 (0.18)96 (0.49)2.80 (2.27–3.44)<.001
 IBD265 (0.03)68 (0.35)10.87 (8.32–14.19)<.001
 Cancer1147 (0.14)133 (0.68)4.92 (4.11–5.89)<.001
 Medication
 Steroid333,265 (40.29)11,726 (59.84)2.21 (2.15–2.27)<.001
 Methotrexate162 (0.02)26 (0.13)6.78 (4.48–10.27)<.001
 Cyclosporine302 (0.04)29 (0.15)4.07 (2.78–5.96)<.001
  1. amean (standard deviation)
  2. IDA Iron deficiency anemia, BJI Bone and joint infection, HEP Hepatitis, CKD Chronic kidney disease, PUD Peptic ulcer disease, COPD Chronic obstructive pulmonary disease, SLE Systemic lupus erythematosus, RA Rheumatoid arthritis, IBD Irritable bowel disease