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Table 3 Risk for small-for-gestational-age (SGA) birth associated with hyperemesis gravidarum (HG)

From: Relationship between hyperemesis gravidarum and small-for-gestational-age in the Japanese population: the Japan Environment and Children’s Study (JECS)

 

Total number

No data on birth n (%)

Non-SGA birth n (%)

SGA birth n (%)

Crude

Confounder-adjusted

RR

95 % CI

RR

95 % CI

HG

136

8 (5.9)

119 (87.5)

9 (6.6)

0.97

0.51–1.83

0.81

0.39–1.66

No HGa

6393

331 (5.2)

5622 (87.9)

440 (6.9)

(1.0)

 

(1.0)

 

No data on HG state

2102

144 (6.9)

1821 (86.6)

137 (6.5)

    
  1. The crude and adjusted risk ratios calculated using covariates such as the mother’s age, pre-pregnancy BMI, weight gain during pregnancy, parity, smoking and alcohol consumption status, education, and income, to determine the effect of HG on the risk of SGA birth
  2. RR risk ratio, CI confidence interval
  3. aUsed as reference in the calculation of risk ratios