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Table 1 Social-demographic and psychological characteristics of 418 mothers who were included in analyses and 79 women who were not included

From: Infant motor development in rural Vietnam and intrauterine exposures to anaemia, iron deficiency and common mental disorders: a prospective community-based study

Characteristic Included Not included p-value
Mother age (years), mean [SD] 26.1 [4.8] 25.8 [5.2] 0.55
Education level, No. (%)    
  Partial or complete primary school (Grades 1–5) 77 (18.4) 15 (18.9) 0.39
  Secondary school (Grades 6–9) 223 (53.4) 37 (46.9)  
  High school (Grades 10–12) 50 (12.0) 8 (10.1)  
  Any post-secondary education 68 (16.3) 19 (24.1)  
Occupation, No. (%)    
  Farmer 191 (45.7) 31 (39.2) 0.76
  Factory, handcraft worker or retailer 131 (31.3) 27 (34.2)  
  Government or private officer 50 (12.0) 11 (13.9)  
  Not currently engaged in income-generating activity 46 (11.0) 10 (12.7)  
Household wealth index, mean [SD] −0.01 (1.8) 0.09 (2.1) 0.61
Welcome pregnancy, No. (%) 369 (88.3) 69 (87.3) 0.84
Maternal haemoglobin (g/dL ) – Wave 1, mean [SD] 11.9 (1.2) 11.8 (0.9) 0.91
Maternal ferritin (ng/mL) – Wave 1, median {interquartile range} 64 {39–108} 63 {37–101} 0.55
Maternal height (cm), mean [SD] 153.3 [4.6] 153.2 [4.7] 0.84
Common mental disorders symptoms*, No. (%)    
  Wave 1 167 (40.0) 38 (48.1) 0.18
  Wave 2 106 (28.0) N/A  
  Wave 3 41 (10.8)a N/A  
  Wave 4 47 (12.4)b N/A  
  1. *Common mental disorders symptoms: EPDS-V score ≥ 4; Wave 1: 12–20 weeks of gestation; Wave 2: 32+ weeks of gestation; Wave 3: 8 weeks postpartum; Wave 4: 6 months postpartum; a Missing 9 cases; b Missing 19 cases.