Table 1.

Mean Value and Standard Deviation (SD) of Variables

Area	Wuhan	Beijing	Others	Area Mean	p value
Sample Size	522	493	623
Age (years)	29.54±0.35	29.28±0.36	31.49±0.32	30.20±0.20	< 0.001
BMI	25.06±0.16	23.77±0.17	24.18±0.15	24.34±0.10	< 0.001
Score of SES	0.10±0.09	−0.13±0.09	0.09±0.08	0.002±0.05	0.198
Weeks of Pregnancy	25.48±0.52	25.00±0.54	25.65±0.48	25.40±0.30	0.660
Times of Pregnancy	1.64±0.04	1.67±0.04	1.57±0.04	1.62±0.02	0.188
Times of Births	1.18±0.02	1.12±0.02	1.16±0.02	1.15±0.01	0.029
Score of SCL-90	16.59±0.28	16.94±0.29	17.90±0.25	17.19±0.16	0.001
Score of PCL-5	3.75±0.37	5.40±0.37	6.15±0.33	5.16±0.21	< 0.001
Score of ISI	3.74±0.20	4.12±0.20	4.62±0.18	4.19±0.11	0.003

Notes: The p values of SCL-90, PCL-5, and the ISI score were obtained without controlling for other variables.