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. 2017 Apr 4;114(16):4201–4206. doi: 10.1073/pnas.1617911114

Table 1.

Baseline characteristics of the 2,365 studied orphan/MNO pairs

Variable Prenatal orphans (n = 656) MNOs (n = 656) Postnatal orphans (n = 1,709) MNOs (n = 1,709)
Date of birth, mean 28 April 1915 27 April 1915 1 April 1915 2 April 1915
Sex, n (%)
 Female 319 (48.6) 319 (48.6) 814 (47.6) 814 (47.6)
 Male 337 (51.4) 337 (51.4) 895 (52.4) 895 (52.4)
Legitimacy, n (%)
 Legitimate 630 (96.0) 552 (84.1) 1,509 (88.3) 1,413 (82.7)
 Illegitimate 26 (4.0) 104 (15.9) 200 (11.7) 296 (17.3)
Paternal OS (95% CI) 2.60 (2.46, 2.74) 2.70 (2.58, 2.82) 2.62 (2.55, 2.69) 2.75 (2.68, 2.83)
Maternal OS (95% CI) 4.42 (4.26, 4.59) 4.70 (4.53, 4.86) 4.44 (4.34, 4.54) 4.62 (4.52, 4.72)
Maternal age, mean (SD) 25.8 (4.3) 26.2 (4.5) 25.6 (4.9) 26.4 (5.0)
Paternal age, mean (SD) 28.7 (4.3) 30.4 (5.7) 28.5 (4.9) 30.6 (6.2)
Status at age 99, n (%)
 Dead 630 (96.0) 637 (97.1) 1,645 (96.3) 1,632 (95.5)
 Alive 26 (4.0) 19 (2.9) 64 (3.7) 77 (4.5)

OS, occupation score (Methods).