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Table 1 Maternal and neonatal characteristics of the study participants (n = 13249) according to mother’s marital status

From: The lifelong socioeconomic disadvantage of single-mother background - the Helsinki Birth Cohort study 1934–1944

  Married Unmarried
Mean (SD)/n (%) Mean (SD)/n (%)
n = 12612 n = 637
Mother
 Height (m) 159.9 (5.6) 159.1 (6.5)
 Weight (kg) 67.1 (8.3) 65.5 (8.1)
 Body mass index (kg/m2) 26.2 (2.9) 25.9 (2.6)
 Age (years) 28.5 (5.4) 26.5 (5.8)
Neonate
 Birth weight (g) 3413.2 (478.4) 3274.7 (465.6)
 Head circumference (cm) 35.0 (1.5) 34.7 (1.5)
 Birth length (cm) 50.3 (1.9) 49.8 (2.0)
 Ponderal index (kg/m3) 26.8 (2.2) 26.5 (2.5)
 Gestational age (days) 279.6 (12.9) 277.0 (16.7)
 Birth order, first born 5929 (47.0 %) 495 (77.7 %)
Paternal occupationa (highest) n = 12946 n = 12612 n = 334
 Senior clerical 2170 (17.2 %) 53 (15.9 %)
 Junior clerical 3073 (24.4 %) 64 (19.2 %)
 Worker 7369 (58.4 %) 217 (65.0 %)
Maternal occupation (highest) n = 11819 n = 11182 n = 637
 Senior clerical 484 (4.3 %) 13 (2.0 %)
 Junior clerical 4363 (39.0 %) 141 (22.1 %)
 Worker 6339 (56.7 %) 483 (75.8 %)
Rooms in childhood household n = 9383 n = 8927 n = 456
 1 room 3530 (39.5 %) 266 (58.3 %)
 2 rooms 3938 (44.1 %) 146 (32.0 %)
 3 rooms 1124 (12.6 %) 37 (8.1 %)
 4 or more rooms 335 (3.8 %) 7 (1.5 %)
Habitants in childhood household n = 8321 n = 7933 n = 388
 2 habitants 179 (2.3 %) 58 (14.9 %)
 3 habitants 3448 (43.4 %) 149 (38.3 %)
 4 habitants 2519 (31.7 %) 97 (24.9 %)
 5 or more habitants 1787 (22.5 %) 84 (21.6 %)
Temporary evacuation abroad to a foster family during World War II (n = 13062) 1671 (13.4 %) 99 (15.8 %)
  1. aFather or other male caregiver