Table 2 Univariable and multivariable logistic regression analysis on LGA and SGA.

General characteristics

Maternal age

1.07 (1.03,1.11)

< 0.001*

1.05(1.00,1.09)

0.032*

0.99(0.95,1.04)

0.729

Parity

1.49(1.28,1.73)

< 0.001*

1.31(1.09,1.58)

0.005*

0.57(0.41,0.79)

0.001*

0.59(0.42,0.81)

0.001*

BMI category

Underweight (BMI < 18.5)

1.63 (0.64,4.16)

0.307

1.83(0.72,4.70)

0.206

2.13 (0.90,5.02)

0.085

Normal (BMI 18.5–24.9)

Reference

-

Reference

-

Reference

-

Overweight (BMI 25–29.9)

2.42 (1.57, 3.73)

< 0.001*

2.28(1.47,3.54)

< 0.001*

1.05(0.59,1.89)

0.866

Obese (BMI ≥ 30)

4.73 (2.98,7.50)

< 0.001*

4.55(2.85,7.26)

< 0.001*

0.75(0.30,1.92)

0.552

Gestational age at delivery

Preterm (< 37 week)

1.25(0.59,2.64)

0.567

9.71(5.84,16.15)

< 0.001*

9.46(5.67,15.79)

< 0.001*

Term (37–41 week)

Reference

-

Reference

-

Reference

-

Post-term ≥ 42 week)

0.75 (0.37,1.52)

0.421

1.26(0.54,2.95)

0.595

1.10(0.47,2.61)

0.820

Lifestyle characteristics

Smoking

No

Reference

-

Reference

-

Yes

1.54(0.48,4.91)

0.466

1.83(0.44,7.57)

0.402

Snuffing tobacco

No

Reference

-

Reference

-

Yes

1.05(0.44,2.47)

0.914

0.68(0.17,2.74)

0.588

Alcohol consumption

Non-risky drinker

Reference

-

Reference

-

Risky drinker

0.52(0.21,1.24)

0.138

0.87(0.35,2.15)

0.767

Physical activity, hour per week

0.91(0.82,0.10)

0.049*

0.97(0.87,1.08)

0.53

0.99(0.87,1,12)

0.86

Socioeconomic characteristics

Education

High education > 12 years

Reference

-

Reference

-

Secondary school level or lower

1.14(0.80,1.61)

0.469

1.19(0.76,1.86)

0.46

Employment

Employed

Reference

-

Reference

-

Unemployed

1.15(0.72,1.85)

0.553

0.80(0.40,1.61)

0.533