Table 3.

Proposed classification of the degree of malnutrition for adolescents and young adults with eating disorders

	Mild	Moderate	Severe
% mBMIa	80%–90%	70%–79%	<70%
BMI Z-scoreb	−1 to −1.9	−2 to −2.9	−3 or greater
Magnitude of weight lossc	5%	7.5%	10%
Rapidity of weight lossd		5% in 1 month	>5% in 1 month
		7.5% in 3 months	>7.5% in 3 months
		10% in 6 months	>10% in 6 months
		20% in 1 year	>20% in 1 year

One or more of the following would suggest mild, moderate, or severe malnutrition.

^aPercent median BMI.

^bMehta et al. [6].

^cWhen two or more data points are available to calculate percent of body mass lost [8].

^dWhen two or more data points are available and timeframe is known [10].