Table 1: Characteristics of study subjects according to the frequency of Si-Wu-Tang use during the 6-month postpartum period.

CharacteristicsFrequency of Si-Wu-Tang use during
the 6-month postpartum period
01–10>10

Total1018458062499
Previous Sheng-Hua-Tang use (%)a
 Yes78.288.788.2343.35<0.001
 No21.811.311.8
Mothers' characteristics
Age (%)a
25 years18.920.319.844.87<0.001
 25–29 years35.737.040.0
 30–34 years32.131.629.8
35 years13.311.110.4
Educational level (%)a
 Junior high school or below15.113.313.343.44<0.001
 Senior high school37.441.542.9
 University or above47.545.243.8
Employment status (%)a
 Yes57.659.158.23.510.17
 No42.440.941.8
Family income per month (%)a
50,000 NT 40.842.240.719.940.003
 50,000–69,999 NT$25.527.126.9
 70,000–99,999 NT$21.920.620.5
100,000 NT 11.810.111.9
Parity (%)a
 151.748.448.628.46<0.001
 238.440.039.1
39.911.612.3
Method of delivery (%)a
 Normal spontaneous delivery66.366.468.41.100.58
 Caesarean section33.733.632.6
Breastfeeding (%)a
 Ever82.682.783.71.700.43
 Never17.417.316.3
Postpartum nursing centre (%)a
 Yes6.97.58.58.440.02
 No93.192.591.5
Out-patient clinic visits during the past 4 weeks (%)a
 Yes31.133.231.97.470.02
 No68.966.868.1
Infants' characteristics
Sex (%)a
 Male52.351.552.20.950.62
 Female47.748.547.8
Low birth weight or preterm (%)a
 Yes10.69.910.41.710.43
 No89.490.189.6
Primary nursery by mother (%)a
 No14.213.814.37.560.27
 Daytime2.12.12.8
 Evening or night8.38.07.7
 Whole day75.476.175.2

Calculated by column totals.