Clarifying the relationship and analyzing the influential factors of bronchial asthma in children with attention-deficit hyperactivity disorder

Table 1 Comparison of clinical data between the attention-deficit hyperactivity disorder and control groups

Parameter	ADHD group (n = 183)	Control group (n = 549)	χ2/t	P value
Sex (cases)
Male	96	283	0.046	0.831
Female	87	266
Age (yr, mean ± SD)	9.41 ± 1.68	9.62 ± 1.77	1.407	0.160
Ethnicity (cases)
Han	171	517	0.129	0.720
Non-Han	12	32
Feeding method (cases)
Breastfed	121	383	0.985	0.611
Formula-fed	26	74
Mixed feeding	36	92
Gestational Age at Birth (wk)
Full-term	155	469	0.315	0.855
Preterm	16	50
Postterm	12	30
Brain Injury (cases)
Yes	3	6	0.338	0.561
No	180	543
Family history of asthma/allergic diseases (cases)
Yes	41	65	12.371	< 0.001
No	142	484

ADHD: Attention-deficit hyperactivity disorder.