Table 2.

Average Percent Change in Weight over 5-Year Study Period, by Body Mass Index Transition Group

Transitioned to higher BMI category
Normal weight→overweight	Overweight→obese	Normal weight→obese
+19.34%	+21.21%	+36.33%
(n=266)	(n=201)	(n=70)
Transitioned to lower BMI category
Overweight→normal weight	Obese→overweight
−8.62%	−14.35%
(n=57)	(n=60)
Maintained BMI category
Normal weight→normal weight	Overweight→overweight	Obese→obese
+5.93%	+2.91%	+4.02%
(n=577)	(n=259)	(n=399)

Calculations for percent change in weight are based on nonimputed data at two time points: (1) weight in pounds before index pregnancy and (2) weight in pounds 5 years after index pregnancy.

BMI, body mass index.