Table 6.

Analysis of the predictive effect of different pre-pregnancy BMI lower body composition indexes on GDM.

	Classification	AUC	P	95%CI	Cutoff points	Sensitivity	Specificity	Youden index
TBW(kg)	All	0.599	<0.001	0.580~0.617	39.65	0.019	0.996	0.015
	Pre-pregnancy BMI <24kg/m2	0.514	0.332	0.486~0.542	30.55	0.219	0.815	0.034
	Pre-pregnancy BMI ≥24kg/m2	0.554	<0.001	0.529~0.580	32.05	0.371	0.629	0.009
Protein(kg)	ALL	0.601	<0.001	0.583~0.620	8.15	0.454	0.696	0.15
	pre-pregnancy BMI <24kg/m2	0.518	0.202	0.490~0.546	8.05	0.239	0.794	0.033
	pre-pregnancy BMI ≥24kg/m2	0.555	<0.001	0.529~0.581	8.55	0.455	0.629	0.084
Minerals(kg)	All	0.585	<0.001	0.566~0.604	3.005	0.454	0.670	0.124
	Pre-pregnancy BMI <24kg/m2	0.505	0.722	0.477~0.533	3.115	0.145	0.877	0.022
	Pre-pregnancy BMI ≥24kg/m2	0.541	0.002	0.515~0.567	3.225	0.391	0.677	0.068
BMC(kg)	All	0.581	<0.001	0.563~0.600	2.515	0.454	0.664	0.118
	Pre-pregnancy BMI <24kg/m2	0.507	0.619	0.479~0.535	2.015	0.936	0.086	0.022
	Pre-pregnancy BMI ≥24kg/m2	0.537	0.005	0.511~0.563	2.875	0.190	0.875	0.065
BFM(kg)	All	0.663	<0.001	0.645~0.680	20.95	0.626	0.626	0.252
	Pre-pregnancy BMI <24kg/m2	0.584	<0.001	0.556~0.612	16.35	0.662	0.458	0.120
	Pre-pregnancy BMI ≥24kg/m2	0.584	<0.001	0.558~0.609	28.85	0.377	0.766	0.143
SLM (kg)	All	0.599	<0.001	0.581~0.618	39.45	0.442	0.707	0.149
	Pre-pregnancy BMI <24kg/m2	0.515	0.306	0.486~0.543	38.95	0.237	0.798	0.035
	Pre-pregnancy BMI ≥24kg/m2	0.554	<0.001	0.529~0.580	40.25	0.541	0.547	0.088
FFM(kg)	All	0.598	<0.001	0.581~0.617	41.15	0.507	0.641	0.148
	Pre-pregnancy BMI <24kg/m2	0.514	0.325	0.486~0.542	34.55	0.877	0.161	0.038
	Pre-pregnancy BMI ≥24kg/m2	0.553	<0.001	0.528~0.579	44.05	0.429	0.658	0.087
SMM (kg)	All	0.601	<0.001	0.583~0.620	22.65	0.458	0.692	0.152
	Pre-pregnancy BMI <24kg/m2	0.517	0.224	0.489~0.546	22.55	0.213	0.822	0.035
	Pre-pregnancy BMI ≥24kg/m2	0.555	<0.001	0.529~0.581	24.25	0.375	0.714	0.089
PBF(%)	All	0.647	<0.001	0.629~0.665	33.75	0.657	0.568	0.225
	Pre-pregnancy BMI <24kg/m2	0.577	<0.001	0.549~0.605	32.65	0.423	0.695	0.118
	Pre-pregnancy BMI ≥24kg/m2	0.563	<0.001	0.537~0.588	36.95	0.669	0.447	0.116
WHR	All	0.632	<0.001	0.614~0.651	0.885	0.609	0.587	0.196
	Pre-pregnancy BMI <24kg/m2	0.570	<0.001	0.542~0.598	0.855	0.636	0.468	0.104
	Pre-pregnancy BMI ≥24kg/m2	0.569	<0.001	0.543~0.595	0.945	0.354	0.762	0.116
VFL	All	0.656	<0.001	0.639~0.674	10.5	0.551	0.685	0.236
	Pre-pregnancy BMI <24kg/m2	0.577	<0.001	0.549~0.605	8.5	0.401	0.716	0.117
	Pre-pregnancy BMI ≥24kg/m2	0.579	<0.001	0.553~0.604	13.5	0.466	0.655	0.121
BMR(kcal/day)	All	0.598	<0.001	0.580~0.617	1259.5	0.505	0.643	0.148
	Pre-pregnancy BMI <24kg/m2	0.514	0.319	0.486~0.543	1116.5	0.875	0.162	0.037
	Pre-pregnancy BMI ≥24kg/m2	0.553	<0.001	0.527~0.579	1300.5	0.521	0.567	0.088

AUC, area under curve.