Table 4.

Role of demographic and obstetric characteristics on the effect of prenatal self-care based on Orem’s theory on preterm birth occurrence in women at risk for preterm birth

	Beta	Std. Error	Linear regression t	p
Constant	2.90	490	5.93	<0.001
Age of mothers	−0.01	0.00	−1.46	0.14
Education	−0.02	0.03	−0.72	0.47
Income	0.04	0.08	−0.58	0.55
Job	0.06	0.06	0.99	0.32
Husbands job	0.00	0.04	0.00	0.99
Insurance type	−0.31	0.16	−1.87	0.06
Housing status	−0.01	0.02	−0.48	0.62
Number of pregnancies	−0.07	0.37	−0.19	0.84
Number of deliveries	−0.19	0.43	−0.44	0.66
Number of abortions	0.09	0.37	0.24	0.80
Number of preterm labor	−0.04	0.07	−0.61	0.54
Number of alive children	0.34	0.57	0.59	0.55
Number of dead children	0.31	0.56	0.56	0.57
Number of stillbirths	0.38	0.54	0.71	0.47
Interval of current and previous pregnancy (Year)	−0.02	0.05	−0.74	0.38
History of self-care education	−0.08	0.06	−1.31	0.19
Interest in learning about complications of preterm birth	0.06	0.07	0.80	0.42
Interest in learning about symptoms of preterm birth and self-care activities	−0.09	0.07	−1.23	0.22