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Table 1 Description of study sample according to characteristics collected at perinatal and 3-month follow-up

From: Prevalence and associated factors of supine sleep position in 3-month-old infants: findings from the 2015 Pelotas (Brazil) Birth Cohort

Characteristics

n (%)

Infant’s sex

 Male

2076 (50.5)

 Female

2032 (49.5)

Maternal skin color

 Black

646 (15.9)

 Brown

527 (12.9)

 White

2902 (71.2)

Family income (quintiles)

 Q1

762 (19.7)

 Q2

778 (20.1)

 Q3

778 (20.1)

 Q4

869 (22.5)

 Q5

680 (17.6)

Maternal education (years of schooling)

 0–4

367 (8.9)

 5–8

1058 (25.8)

 9–11

1413 (34.4)

 ≥12

268 (30.9)

Maternal age (years)

 ≤18

417 (10.1)

 19–24

1156 (28.1)

 25–30

1198 (29.2)

 31–36

988 (24.1)

 ≥37

348 (8.5)

Parity

 ≥5

159 (3.9)

 4

186 (4.5)

 3

456 (11.1)

 2

1273 (31.0)

 1

2033 (49.5)

Maternal cohabitation with a partner

 No

584 (14.2)

 Yes

3523 (85.8)

Who advised on infant sleep position*

 Nobody

1706 (41.6)

 Child’s father or grandparents

157 (3.8)

 Physician

1452 (35.4)

 Other health care professionals

671 (16.3)

 Other

120 (2.9)

Breastfeeding at 3 months*

 No

957 (23.3)

 Yes

3150 (76.7)

Bed sharing at 3 months*

 Yes

1845 (46.8)

 No

2096 (53.2)

Usual infant sleep position*

 Prone

66 (1.6)

 Lateral

1768 (43.0)

 Supine (appropriate position)

2274 (55.4)

  1. *Variables collected at 3-month follow-up
  2. n = 4108