Table 3.

Distribution of perceived milk supply (N = 237)

Variable	n	%	Perception of the milk supply
			Mean	SD	Min	Max	p value
Age (years)
≤ 30	129	54.4	122.3	9.7	96	139	0.90 a
> 30	108	45.6	122.4	10.3	81	140
Educational level
High school and less	159	67.1	122.1	9.5	95	140	0.57 a
College and above	78	32.9	122.9	10.9	81	138
Employment status
Not working	173	73.0	123.1	9.7	81	139	0.07 a
Working	64	27.0	120.5	10.5	98	140
Religion
Islam	214	90.3	122.3	9.7	95	140	0.77 a
Other	23	9.7	122.9	12.1	81	135
Parity
Primiparous	95	40.1	120.9	10.4	96	139	0.06 a
Multiparous	142	59.9	123.4	9.6	81	140
Mode of Delivery
Vaginal delivery/IVD	173	73.0	122.9	9.6	95	140	0.17 a
Cesarean delivery	64	27.0	120.9	10.8	81	139
Delivery location
Hospital	163	68.8	121.9	10.6	81	140	0.27 a
Public health center/midwifery clinic	74	31.2	123.3	8.4	100	138
Rooming-in
No	86	36.3	120.4	9.4	98	140	0.02 a
Yes	151	63.7	123.5	10.1	81	139
Skin-to-skin contact
No	71	30.0	119.2	10.7	81	139	0.001 a
Yes	166	70.0	123.7	9.3	95	140
Breastfeeding self-efficacy
≤ 50	31	13.1	111.8	10.7	81	132	0.0001 a
> 50	206	86.9	123.9	8.9	95	140
Infant’s age (months)
0 ~ 1	56	23.6	122.0	10.8	81	139	0.31 b
2 ~ 3	95	40.1	121.4	9.4	96	139
4 ~ 5	86	36.3	123.6	10.0	98	140
Infant’s gender
Girl	127	53.6	121.9	10.2	81	139	0.50 a
Boy	110	46.4	122.8	9.8	95	140
Infant’s birth weight (g)
≤ 3000	95	40.1	121.8	9.8	96	140	0.51 a
> 3000	142	59.9	122.7	10.1	81	139
Infant sucking behavior
Negative	37	15.6	119.4	9.4	98	134	0.05 a
Positive	200	84.4	122.9	10.0	81	140

Note: IVD instrumental vaginal delivery, SD Standard Deviation, Min Minimum, Max Maximum; ^at-test; ^bone-way ANOVA