Table 1 Demographic characteristics of participants

Age (year), mean (SD)

31.88 (5.93)

31.97 (5.96)

31.78 (5.89)

Education, n (%)

High school or below

74 (10.6)

37 (10.6)

37 (10.6)

Associate or Bachelor’s degree

542 (77.7)

270 (77.4)

271 (77.7)

Master’s degree or higher

82 (11.7)

42 (12.0)

41 (11.7)

Employment, n (%)

Yes

564 (80.8)

280 (80.2)

284 (81.4)

No

134 (19.2)

69 (19.8)

65 (18.6)

Marriage status, n (%)

Single

279 (40.0)

138 (39.5)

141 (40.4)

Married

415 (59.5)

208 (59.6)

207 (59.3)

Divorced or bereaved

4 (0.5)

3 (0.9)

1 (0.3)

Monthly income, n (%)

Very insufficient

54 (7.7)

34 (9.7)

20 (5.7)

Insufficient

406 (58.2)

199 (57.0)

207 (59.3)

Sufficient

234 (33.5)

113 (32.4)

121 (34.7)

Very sufficient

4 (0.6)

3 (0.9)

1 (0.3)

Residential area, n (%)

Metropolitan city

386 (55.3)

188 (53.9)

198 (56.7)

Province

312 (44.7)

161 (46.1)

151 (43.3)

Childbirth

Yes

169 (24.2)

87 (24.9)

82 (23.5)

No

529 (75.8)

262 (75.1)

267 (76.5)

Number of childbirths^a, mean (SD)

0.35 (0.67)

0.33 (0.62)

0.36 (0.71)

Age at first childbirth^a, mean (SD)

30.82 (3.98)

30.92 (3.79)

30.71 (4.19)

Health issues of the baby immediately after childbirth^a, n(%)

Yes

20 (11.8)

12 (13.6)

8 (9.8)

No

150 (88.2)

76 (86.4)

74 (90.2)

Baby who was sick right after birth^b (Duplicate selection), n (%)

First

18 (85.7)

10 (83.3)

8 (88.9)

Second

3 (14.3)

2 (16.7)

1 (11.1)

Perinatal hospital care for a disease^b, n (%)

Yes

20 (18.0)

11 (20.0)

9 (16.1)

No

91 (82.0)

44 (80.0)

47 (83.9)

Number of premature births^b, mean (SD)

1.21 (0.47)

1.24 (0.50)

1.19 (0.43)

Risk of premature birth, n (%)

Very low

62 (8.9)

31 (8.9)

31 (8.9)

Low

188 (26.9)

93 (26.6)

95 (27.2)

Moderate

313 (44.8)

159 (45.6)

154 (44.1)

High

120 (17.2)

57 (16.3)

63 (18.1)

Very high

15 (2.2)

9 (2.6)

6 (1.7)

Premature birth education, n (%)

Yes

430 (61.6)

216 (61.9)

214 (61.3)

No

268 (38.4)

133 (38.1)

135 (38.7)