Table 1.

Comparison of the duration of exclusive breastfeeding based on maternal demographic and obstetric history

Characteristics	Subgroups	N (%)	Duration of exclusive breastfeeding, (month) Mean±SD	P value
Mother’s educational level	Under high-school	1028 (38.94)	4.84±1.89	<0.001*
	High-school graduate	978 (37.05)	4.54±2.02
	Undergraduate degree	610 (23.10)	4.43±2.05
	Postgraduate degree	24 (0.91)	4.31±1.98
Husband’s educational level	Under high-school	1166 (44.17)	4.78±1.91	0.003*
	High-school graduate	943 (35.72)	4.53±2.02
	Undergraduate degree	481 (18.22)	4.44±2.08
	postgraduate degree	50 (1.89)	4.56±1.83
Mother’s job status	Housekeeper	2391 (90.57)	4.66±1.98	0.03**
	Employed	249 (9.43)	4.37±1.98
Type of mother’s job	Non	2391 (90.57)	4.68±1.97	<0.001*
	Part-time	81 (3.07)	4.21±2.01
	Full-time	168 (6.36)	4.02±2.12
Ethnicity	Fars	1912 (72.42)	4.58±1.99	<0.001*
	Turk	193 (7.31)	5.18±1.61
	Lors	461 (17.46)	4.59±2.17
	Other	74 (2.80)	4.56±2.02
Socio-economic status	High	50 (1.89)	4.21±2.23	0.64*
	Medium-high	302 (11.44)	4.62±2.01
	Medium	1689 (63.98)	4.64±1.97
	Medium-low	411 (15.57)	4.60±2.00
	Low	188 (7.12)	4.67±1.95
History of the type of deliveries	NVDa	1024 (38.79)	4.91±1.80	<0.001*
	Cesarean section	1337 (50.64)	4.45±2.08
	Both	279 (10.57)	4.45±2.05
Number of total children born by cesarean sections	Non	1024 (38.79)	4.91±1.80	<0.001*
	One	1165 (44.13)	4.39±2.11
	Two	359 (13.60)	4.66±1.91
	Three or more	92 (3.48)	4.44±2.23
Number of total children born by NVDsa	Non	1337 (50.64)	4.45±2.08	<0.001*
	One	671 (25.42)	4.74±1.90
	Two	417 (15.80)	4.92±1.74
	Three or more	215 (8.14)	4.84±1.98
History of abortion/still birth	No	2166 (82.05)	4.69±1.95	0.001**
	Yes	474 (17.95)	4.35±2.11
History of infertility (primary/secondary)	No	2614 (99.05)	4.63±1.99	0.99**
	Yes	26 (0.98)	4.64±1.49
History of abnormal child	No	2615 (99.05)	4.63±1.99	0.90**
	Yes	25 (0.95)	1.58±1.50

^anormal vaginal delivery

^*ANOVA

^**Independent t-test