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Table 1 Participant characteristics

From: Mental health problems and influencing factors in Japanese women 4 months after delivery

   (n =584)
   Variable   
  Average SD
Age (years) 31.4 5.1
Height (cm) 158.1 5.3
Weight (kg) 51.9 7.0
Gestational age at delivery (weeks) 38.9 1.5
  n %
Parity   
 Primiparous 279 47.8
 Multiparous 305 52.2
Methods of birth   
 Vaginal birth 507 86.8
 Caesarean section 77 13.2
Term   
 Preterm (<37 weeks) 30 5.1
 Full term (37–41 weeks) 547 93.7
 Post term (≥42 weeks) 7 1.2
Marital status   
 Married or living with partner 567 97.1
 Single 13 2.2
 Divorced 4 0.7
 Widowed 0 0
Pregnancy   
 Planed 440 75.3
 Not planed 144 24.7
Breastfeeding status   
 Fully breastfeeding 383 65.6
Partially breastfeeding 143 24.5
 Formula feeding 58 9.9
Eating meals regularly   
 Yes 507 86.8
 No 77 13.2
Appetite   
 Good 559 95.7
 Poor 25 4.3
Frequency of going out   
 Almost everyday 255 43.7
 2–3 times a week 251 43.0
 Once a week 61 10.4
 1–2 times a month 13 2.2
 Less 4 0.7
Financial difficulty   
 No 467 80.0
 Yes 117 20.0
Stressful life events experienced   
 Yes 183 31.3
 No 401 68.7
History of depression   
 Yes 36 6.2
 No 548 93.8