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Table 1 Baseline characteristics of study subjects according to pregnancy intention

From: Impact of unintended pregnancy on maternal mental health: a causal analysis using follow up data of the Panel Study on Korean Children (PSKC)

  Total Pregnancy intention  
   Unintended Intended  
  N = 2076 N = 525 (25.3%) N = 1551 (74.7%) P value
Maternal age (years) 31.3 ± 3.7 30.0 ± 4.2 31.5 ± 3.5 0.0228
Paternal age (years) 33.9 ± 4.0 33.8 ± 4.6 33.9 ± 3.8 0.5571
Infant’s sex     
Boy 1056 (50.9) 262 (49.9) 794 (51.2) 0.6099
Girl 1020 (49.1) 263 (50.1) 757 (48.8)  
Infant’s birth order     
First born 984 (47.5) 200 (38.1) 784 (50.7) <0.0001
Later born 1087 (52.5) 325 (61.9) 762 (49.3)  
Maternal education     
University or over 829 (40.2) 193 (37.1) 635 (41.2) 0.0268§
Junior college 589 (28.6) 144 (27.7) 445 (28.9)  
High school or under 643 (31.2) 183 (35.2) 460 (29.9)  
Paternal education     
University or over 1003 (50.4) 234 (46.4) 769 (51.7) 0.0356§
Junior college 420 (21.1) 111 (22.0) 309 (20.8)  
High school or under 568 (28.5) 159 (31.6) 409 (27.5)  
Maternal occupation     
Non-manual 516 (25.2) 127 (24.4) 389 (25.5) 0.5975
Manual 113 (5.5) 33 (6.4) 80 (5.3)  
Housewife/others 1415 (69.2) 360 (69.2) 1055 (69.2)  
Paternal occupation     
Non-manual 1261 (65.6) 299 (61.8) 962 (66.8) 0.0421
Manual 662 (34.4) 185 (38.2) 477 (33.2)  
Household income quintiles     
I (highest) 411 (19.9) 89 (17.1) 322 (20.9) 0.0002§
II 445 (21.6) 95 (18.2) 350 (22.7)  
III 394 (19.1) 100 (19.2) 294 (19.1)  
IV 377 (18.3) 104 (19.9) 273 (17.7)  
V (lowest) 436 (21.1) 134 (25.7) 302 (19.6)  
Maternal smoking     
No 2059 (99.2) 519 (98.9) 1540 (99.3) 0.399*
Yes 17 (0.8) 6 (1.1) 11 (0.7)  
Paternal smoking     
No 1174 (56.6) 263 (50.1) 911 (58.7) 0.0006
Yes 902 (43.5) 262 (49.9) 640 (41.3)  
Maternal alcohol consumption     
No 1359 (73.0) 347 (72.4) 1012 (73.2) 0.7388
Yes 502 (27.0) 132 (27.6) 370 (26.8)  
Paternal alcohol consumption     
No 367 (21.4) 100 (22.5) 267 (21.0) 0.4931
Yes 1350 (78.6) 344 (77.5) 1006 (79.0)  
  1. *Fisher’s exact test. §Mantel-Haenszel Chi-square test. Data are mean ± standard deviation or n (%).