Prediction of gestational diabetes mellitus by different obesity indices

Table 1 Characteristics of the GDM group and control group^a

	GDM n = 1912	Control n = 13,560	P
Age (years)	32.0 ± 4.1	30.5 ± 3.8	< 0.001
PreBMI (kg/m²)	22.9 ± 3.6	21.5 ± 3.0	< 0.001
< 18.5	17.6 ± 0.7	17.6 ± 0.7	0.59
≥ 18.5 to < 24.0	21.0 ± 1.5	21.4 ± 1.5	< 0.001
≥ 24.0 to < 28.0	25.7 ± 1.1	25.5 ± 1.1	< 0.001
≥ 28.0	30.5 ± 2.3	30.0 ± 1.9	0.008
AC (cm)	84.2 ± 9.4	80.2 ± 8.8	< 0.001
Q1 (< 74.0)	70.2 ± 2.7	70.0 ± 2.6	0.45
Q2/Q3(74.0–86.0)	80.3 ± 3.6	79.4 ± 3.6	< 0.001
Q4 (> 86.0)	94.3 ± 6.4	93.6 ± 6.2	0.009
ACHtR (cm/cm)	0.52 ± 0.06	0.50 ± 0.05	< 0.001
Q1 (< 0.46)	0.44 ± 0.02	0.44 ± 0.02	0.15
Q2/Q3(0.46–0.53)	0.50 ± 0.02	0.49 ± 0.02	< 0.001
Q4 (> 0.53)	0.58 ± 0.04	0.58 ± 0.04	0.09
Parity (%)			< 0.001
Primipara	1349(70.6)	10,277(75.8)
Multipara	563(29.4)	3283(24.2)
Gravidity (%)			< 0.001
Primigravid	846 (44.2)	7224 (53.3)
Multigravid	1066 (55.8)	6336 (46.7)
Gestational weeks of delivery	38.6 ± 1.5	38.9 ± 1.5	< 0.001
Neonatal birth weight (kg)	3.32 ± 0.49	3.34 ± 0.45	0.09
Postpartum hemorrhage (%)	53(2.8)	312(2.3)	0.12

^aPreBMI Prepregnancy body mass index, AC Abdominal circumference, ACHtR Abdominal circumference/height ratio
Values are mean (SD) or medians (interquartile ranges). BMI were divided into four groups: low weight(BMI < 18.5), normal weight (18.5 ≤ BMI < 24.0), overweight (24.0 ≤ BMI < 28.0) and obese (BMI ≥ 28.0); AC were divided into three groups according to the quartile(Q1, low-AC group(< 74.0 cm);Q2/Q3, normal-AC group(74.0–86.0 cm); Q4, high-AC group(> 86.0 cm); ACHtR were divided into three groups according to the quartile (Q1, Low- ACHtR group(< 0.46);Q2/Q3, Normal-ACHtR group(0.46–0.53); Q4, High-ACHtR group(> 0.53))

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