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Table 1 Clinical data of IHS > 1.25 group and IHS ≤ 1.25 group

From: Risk factors analysis of attention deficit/hyperactivity disorder and allergic rhinitis in children: a cross-sectional study

variable Total (n = 465) IHS > 1.25 group (n = 122) IHS ≤ 1.25 group (n = 343) P
Age 9.53 ± 1.60 8.59 ± 1.41 9.79 ± 1.48 < 0.01
gender 219/246 68/54 151/192 < 0.01
Other allergic diseases (merged/not combined) 121/344 35/87 86/257 0.423
Allergens (simple/mixed) 302/163 74/48 228/115 0.221
Family history (with/without) 138/327 35/87 103/240 0.805
TNSS
SNAP-IV 5.68 ± 2.00 7.38 ± 1.69 5.04 ± 1.79 < 0.01
 Inattention 9.70 ± 5.40 15.48 ± 4.29 7.61 ± 4.01 < 0.01
 Hyperactivity/impulsivity 8.51 ± 5.03 13.91 ± 2.77 6.49 ± 3.13 < 0.01
IHS 1.01 ± 0.47 1.68 ± 0.29 0.78 ± 0.39 < 0.01
PRQLQ
 Nasal symptom score 2.46 ± 1.28 3.55 ± 1.09 2.04 ± 1.21 < 0.01
 Ocular symptoms score 1.79 ± 0.99 2.34 ± 0.96 1.67 ± 0.93 < 0.01
 Behavioral problem score 1.99 ± 0.88 2.61 ± 0.81 1.77 ± 0.84 < 0.01
Non-eye and nose symptoms score 1.34 ± 0.95 2.04 ± 0.83 1.09 ± 0.84 < 0.01
 Activity and sleep score 1.25 ± 0.77 1.74 ± 0.75 1.06 ± 0.73 < 0.01
AR duration in 1 year
  ≤ 1 month 142(30.5) 11 (8.6) 131 (38.1) < 0.01
 1~3 months 139(29.9) 22 (18.1) 117 (34.1) < 0.01
 3~6 months 112(24.1) 57 (46.6) 55 (16.1) < 0.01
 6~9 months 49(10.5) 24 (19.8) 25 (7.4) < 0.01
 9~12 months 23(4.9) 8 (6.9) 15 (4.3) 0.267
Skin index
 + 124(26.7) 17 (13.8) 107 (31.3) < 0.01
 ++ 182(39.1) 47 (38.8) 135 (39.3) 0.948
 +++ 138(29.7) 48 (39.7) 90 (26.3) < 0.01
 ++++ 21(4.5) 10 (7.8) 11 (3.1) 0.031
  1. P:comparison between IHS > 1.25 group and IHS ≤ 1.25 group