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Table 1 Demographic data of study population (n = 255)

From: Paternal involvement and early infant neurodevelopment: the mediation role of maternal parenting stress

Variables n (%) unless stated
Infant’s age (days)a 106.0 (10.6)
Girl 118 (46.3)
First-born infant 233 (91.4)
Vaginal delivery 170 (92.5)
Maternal age (years)a 31.8 (3.1)
Paternal age (years)a 33.8 (3.3)
Maternal level of education
 High school 19 (7.5)
 College 194 (76.1)
 Graduate school 42 (16.5)
Paternal level of educational
 High school 14 (5.5)
 College 206 (80.8)
 Graduate school 35 (13.7)
Monthly family income (US dollars)
 Less than 2000 24 (9.4)
 2000-4000 176 (69.0)
 More than 4000 55 (21.6)
  1. aValues are expressed as mean (± standard deviation)