. Author manuscript; available in PMC: 2021 Dec 16.

Published in final edited form as: Eur Eat Disord Rev. 2017 May;25(3):221–223. doi: 10.1002/erv.2508

Table 1.

Demographic and physical characteristics of patients with anorexia nervosa across DSM-5 severity groups

	Mild	Moderate	Severe	Extreme	Test statistic	P value	Effect size
	N=73	N=40	N=30	N=58
Age, mean (SD)	20.9 (8.4)	24.3 (11.2)	23.3 (9.0)	22.3 (9.9)	1.16	.326	.019
Female, N (%)	69 (94.5)	40 (100.0)	27 (90.0)	57 (98.3)	5.71	.127	.168
Body mass index^†	18.1 (0.8)	16.5 (0.3)	15.5 (0.3)	13.8 (0.8)	431.1	<.001	.868
Restricting subtype, N (%)	39 (53.4)	19 (47.5)	15 (50.0)	36 (62.1)	2.40	.493	.109
Binge eating/purging subtype N (%)	34 (46.6)	21 (52.5)	15 (50.0)	22 (37.9)	2.40	.493	.109

Note:

^†

Because the severity categories were created based on different body mass index levels, the statistical indices are reported merely to show (i.e. not to test) that the categorization did yield groups differing on body mass index.