Table 2.

Comparison of Weight Gain During Pregnancy by Screening Group and Gestational Diabetes Mellitus, Stratified by Obesity Status

	Weight gain during pregnancy
	N	Total weight gain (kg)a	Percentage exceeding IOM guidelines
Obese	1,440	11.2	60.1
Screened Early onlyb	178	9.3	42.1
No GDM Early	84	10.1	50.0
GDM Earlyc	94	8.1	35.1
Screened Bothb	680	11.8	64.0
(Screen negative Early; rescreened Usual)
No GDM	592	12.0	65.0
GDM Usualc	88	10.7	56.8
Screened Usual onlyb	582	11.0	61.2
No GDM Usual	514	11.0	61.1
GDM Usualc	68	11.4	61.8
Nonobese	3,951	13.3	36.7
Screened Early onlyd	102	10.4	28.4
No GDM Early	56	11.2	33.9
GDM Earlye	46	8.6	21.7
Screened Bothd	444	13.2	43.9
(Screen negative Early; rescreened Usual)
No GDM	377	13.6	46.7
GDM Usuale	67	10.8	28.4
Screened Usual onlyd	3,405	13.5	36.0
No GDM Usual	3,191	13.6	36.6
GDM Usuale	214	11.6	26.6

^aAdjusted for gestational age of fetus.

^bp < 0.0001 for total weight gain; p < 0.0001 for percentage exceeding IOM guidelines comparing three screening groups in obese women.

^cp = 0.0005 for total weight gain; p = 0.0010 for percentage exceeding IOM guidelines comparing GDM among three screening groups in obese women.

^dp < 0.0001 for total weight gain; p = 0.0010 for percentage exceeding IOM guidelines comparing three screening groups in nonobese women.

^ep = 0.0005 for total weight gain; p = 0.7216 for percentage exceeding IOM guidelines comparing GDM among three screening groups in nonobese women.

IOM, Institute of Medicine.