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Table 2 Allergic history of ADHD children group (N = 549) and control group (N = 3564)

From: The associations between ADHD and asthma in Korean children

Variables Control group (%) ADHD group (%) F p value
Asthma Lifetime 859(24.3) 200(36.6) 99.09 0.000
  12 months 428(12.1) 112(20.5) 100.17 0.000
  Diagnostic Hx 373(10.6) 86(15.8) 46.75 0.002
  Treatment Hx 153(4.3) 37(6.8) 24.70 0.031
Allergic rhinitis Lifetime 1,643(47.2) 316(59.0) 56.08 0.000
  12 months 1,514(43.5) 301(56.2) .01 0.000
  Diagnosis Hx 883(25.4) 162(30.2) 19.37 0.023
  Treatment Hx 755(21.7) 146(27.6) 28.06 0.007
Atopy Lifetime 1,335(38.4) 221(41.4) 5.60 0.193
  12 months 867(24.9) 144(27.0) 3.78 0.316
  Diagnosis Hx 1,188(34.2) 184(34.5) .06 0.899
  Treatment Hx 648(18.7) 106(19.9) 1.64 0.516
Allergic conjunctivitis Lifetime 894(25.6) 158(29.3) 12.06 0.075
  12 months 569(16.3) 97(18.0) 3.86 0.331
  Diagnostic Hx 616(17.6) 105(19.5) 4.28 0.305
  Treatment Hx 365(10.5) 59(10.9) .47 0.730
Food allergy Lifetime 406(11.6) 69(12.9) 2.80 0.397
  12 months 224(6.4) 48(9.0) 18.52 0.050
  Diagnosis Hx 205(5.9) 35(6.6) 1.457 0.544
  Treatment Hx 102(2.9) 24(4.5) 14.50 0.098
Drug allergy Lifetime 69(2.0) 15(2.8) 6.08 0.274
  12 months 32(0.9) 10(1.9) 16.06 0.118
  Diagnosis Hx 30(0.9) 10(1.9) 18.95 0.097
  Treatment Hx 13(0.4) 7(1.3) 32.46 0.064
  1. These data represent N(%) by chi-square test, significant p value <0.05, ADHD: attention deficit hyperactivity disorder, Hx:history.