Table 3 Multiple logistic regression analyses of factors associated with LBW and Macrosomia. Adjusted for nationality, mode of delivery.

From: Trend and risk factors of low birth weight and macrosomia in south China, 2005–2017: a retrospective observational study

Risk Fators

LBW

Macrosomia

RR (95% CI)

p-Value

RR (95% CI)

p-Value

Sex

 Girls (Ref)

1

 

1

 

 Boys

1.17(1.08 to 1.26)

<0.001

1.91(1.71 to 2.14)

<0.001

Maternal age, n (%)

 <20 y (Ref)

1

 

1

 

 20–24 y

2.05(1.57 to 2.67)

<0.001

1.19(0.60 to 2.32)

 

 25–29 y

2.78(2.14 to 3.61)

<0.001

1.71(0.88 to 3.33)

 

 30–34 y

2.63(2.01 to 3.45)

<0.001

2.29(1.17 to 4.47)

<0.001

 >35 y

1.85(1.39 to 2.46)

<0.001

2.44(1.23 to 4.82)

<0.001

Parity

 0 (Ref)

1

 

1

 

 1

0.92(0.84 to 1.01)

0.093

1.77(1.59 to 1.98)

<0.001

 ≥2

0.70(0.57 to 0.85)

<0.001

2.28(1.74 to 2.98)

<0.001

Gestational age

 <37 wk (Ref)

1

 

1

 

 37 to 41 wk

0.04(0.03 to 0.04)

<0.001

6.64(5.21 to 8.44)

<0.001

 ≥42 wk

0.04(0.01 to 0.38)

0.004

20.45(7.63 to 54.78)

<0.001

HDCP

 No (Ref)

1

 

1

 

 yes

5.92(5.35 to 6.55)

<0.001

1.31 (1.02 to 1.68)

0.034

Diabetes

 No (Ref)

1

 

1

 

 Yes

1.38 (1.26 to 1.50)

<0.001

1.58 (1.36 to 1.83)

<0.001

BMI

 <25 (Ref)

1

 

1

 

 25 to 30

0.56(0.51 to 0.62)

<0.001

3.22(2.69 to 3.84)

<0.001

 ≥30

0.68(0.58 to 0.82)

<0.001

9.62(7.91 to 11.72)

<0.001

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