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Table 1 Descriptive statistics of variables used in the analysis (N = 156)

From: Retinoids, anxiety and peripartum depressive symptoms among Chinese women: a prospective cohort study

Variables Mean (SD) n (%)
Age (years) 26.65 (2.70) (22 to 35)  
Education level
 High school or below   7 (4.50)
 College   13 (8.40)
 Undergraduate or high   134 (87.0)
Monthly income (RMB)
  < 3000   10 (6.50)
 3000–5000   114 (74.0)
  > 5000   30 (19.50)
Parity
 First birth   97 (63.0)
 Subsequent   57 (37.0)
Weeks of delivery 38.99 (1.31) (36 to 41)  
Delivery mode
 Vaginal birth   84 (54.50)
 Cesarean section   70 (45.50)
Exclusive breastfeeding (T2)   52 (33.33)
Exclusive breastfeeding (T3)   76 (48.71)
RBP level (mg/L)
 T1 38.39 (2.47)  
 T2 40.35 (1.62)  
 T3 36.86 (1.97)  
Estradiol level (pmol/L)
 T1 14,539.46 (1503.49)  
 T2 2790.27 (1081.80)  
 T3 231.76 (49.89)  
Progesterone level (nmol/L)
 T1 205.81 (52.53)  
 T2 12.58 (8.95)  
 T3 4.72 (1.82)  
Mean PSQI score
 T1 8.67 (3.48)  
 T2 8.79 (3.55)  
 T3 8.61 (3.35)  
SAS score
  ≥ 50 at T1   54 (34.61)
  ≥ 50 at T2   51 (32.69)
  ≥ 50 at T3   57 (36.53)
EPDS score
  ≥ 10 at T1   48 (30.76)
  ≥ 10 at T2   43 (27.56)
  ≥ 10 at T3   56 (35.89)
  1. T1, at the third trimester; T2, after delivery at week one; T3, after delivery at week six
  2. Abbreviations: EPDS Edinburgh Postnatal Depression Scale, PSQI Pittsburgh Sleep Quality Index, RBP retinol-binding protein, SAS Self-rating Anxiety Scale