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

Table 2 Comparison of parental data between the attention-deficit hyperactivity disorder and control groups

Parameter	ADHD group (n = 183)	Control group (n = 549)	χ2/t	P value
Parental highest educational level (cases)
Junior high school or below	41	125	0.160	0.923
High school or vocational school	54	169
College degree or above	88	255
Average monthly household income (cases)
< 5000 RMB	95	290	0.046	0.831
≥ 5000 RMB	88	259
Maternal pregnancy complications (cases)
Present	31	42	13.191	< 0.001
Absent	152	507
Use of asthma/allergy medications during pregnancy (cases)
Yes	38	59	11.981	0.001
No	145	490
Maternal smoking during pregnancy (cases)
Yes	26	75	0.034	0.853
No	157	474
Maternal anxiety and depression during pregnancy (cases)
Yes	28	39	11.091	0.001
No	155	510
Parental relationship status (cases)
Good	141	424	20.052	< 0.001
Average	23	109
Poor	19	16

ADHD: Attention-deficit hyperactivity disorder.