Factors affecting breastfeeding duration in Greece: What is important?

Table 5 Adjusted hazard ratios and 95%CI for any breastfeeding duration

Characteristic	HR	95%CI	P value
Maternal age (per year)	1.01	0.97 to 1.05	P = 0.779
BMI before pregnancy (per kg/m2)	1.01	0.97 to 1.05	P = 0.600
Maternal educational status
High school graduate or lower	1.00
University/college education	0.53	0.37 to 0.76	P = 0.001
Postgraduate degree	0.20	0.09 to 0.43	P < 0.001
Maternal employment status
Unemployed/domestically occupied	1.00		P = 0.213
Employed	0.76	0.50 to 1.17
Maternal nationality
Greek	1.00
Immigrant	0.35	0.21 to 0.38	P < 0.001
Smoking before pregnancy
No	1.00
Yes	0.49	0.20 to 1.22	P = 0.124
Smoking during follow-up
No	1.00
Yes	4.20	2.57 to 6.89	P < 0.001
Maternal psychological problems
No	1.00
Yes	1.72	1.23 to 2.41	P = 0.002
Previous breastfeeding experience
No	1.00		P = 0.069
Yes	0.69	0.46 to 1.03
Breastfeeding encouragement
No	1.00
Yes	0.98	0.60 to 1.58	P = 0.916
Multiparity
Singleton	1.00
Twins	1.83	0.89 to 3.74	P = 0.099
Prematurity
Full-term	1.00		P = 0.088
Premature	1.65	0.93 to 2.93
Pacifier introduction
No	1.00
Yes	2.08	1.40 to 3.08	P < 0.001