Table 5:

Univariate analysis on the incidence of PIH

Influencing Factor	PIH group (n=90)	Normal Pregnancy Group (n=45)	X2 value	P
Age (yr)			9.633	0.005
20–30	18	10
30–40	30	28
> 40	42	7
BMI			38.966	0.000
BMI≤18.5	11	3
Normal	22	25
BMI≥25	57	17
Alcohol Consumption			41.235	0.000
Yes	40	3
No	50	42
Smoking			48.963	0.000
Yes	60	6
No	30	39