Table 2 The differences between IOM and Tibetan recommended weight gain.

From: Optimal Gestational Weight Gain for Tibetans Based on Prepregnancy Body Mass Index

WHO BMI categories

IOM 2009

Tibetan

Underweight (<18.5)

12.5~18.0

17.2 (13.3~20.9)

Normal weight (18.5~24.9)

11.5~16.0

9.3 (5.8~12.9)

Overweight (25.0~29.9)

7.0~11.50

5.2 (1.3~9.1)

Obesity (≥30.0)

5.0~9.1

  1. IOM: institute of medicine, WHO: world health organization, BMI: body mass index.