Self-injurious behaviour in patients with anorexia nervosa: a quantitative study

Table 1 Sample characteristics

Variable	Total (n = 136)	AN (n = 98)	EDNOS (n = 38)
Age, years M [SD]	25.44 [8.56]	24.12 [7.13]	28.84 [10.83]
Gender female, n [%]	131 [96.3]	96 [98.0]	35 [92.1]
Body mass index M [SD]	19.48 [5.53]	18.02^a [3.45]	20.52^b [3.14]
ED duration, years M [SD]	8.4 [7.8]	7.77 [6.70]	10.17 [10.03]
ED treatment duration, years M [SD]	3.2 [3.4]	3.59 [3.65]	2.27 [2.38]
Comorbid psychiatric diagnosis n [%]
No comorbid diagnosis	80 [58.8]	59 [60.2]	21 [55.3]
Comorbid diagnosis total	56 [41.2]	39 [39.8]	17 [44.7]
PTSD	15 [11.0]	13 [13.3]	2 [5.3]
Personality disorder NOS	13 [9.6]	9 [9.2]	4 [10.5]
Depressive disorder	12 [8.8]	8 [8.2]	4 [10.5]
Anxiety disorder	6 [4.4]	3 [3.1]	3 [7.9]
Obsessive compulsive disorder	3 [2.2]	2 [2.0]	1 [2.6]
Borderline personality disorder	3 [2.2]	2 [2.0]	1 [2.6]
Asperger syndrome	2 [1.5]	1 [1.0]	1 [2.6]
Alcohol addiction	1 [0.7]	–	1 [2.6]
Panic disorder	1 [0.7]	1 [1.0]	–
Treatment program n [%]
Inpatient	22 [16.2]	19 [19.4]	3 [7.9]
Outpatient	114 [83.8]	79 [80.6]	35 [92.1]
Living situation n [%]
Alone	43 [31.6]	28 [28.6]	15 [39.5]
With partner or friend[s]	32 [23.5]	22 [22.4]	10 [26.3]
With parents	54 [39.7]	42 [42.9]	12 [31.6]
Sheltered living	2 [1.5]	1 [1.0]	1 [2.6]
Other	5 [3.7]	5 [5.1]	–
Performing SIB n [%; 95%CI]
Lifetime	83 [61; 53.1–69.4]	61 [62.9; 53.0–72.0]	22 [57.9; 42.1–72.5]
Last year	68 [50.0; 47.7–58.3]	48 [49.0; 39.2–58.8]	20 [52.6; 37.1–67.8]
Last month	56 [41.18; 50.4–66.8]	38 [38.8; 29.6–48.6]	18 [47.4; 32.2–62.9]

AN Anorexia Nervosa restrictive subtype and anorexia nervosa binge eating/purging subtype, EDNOS eating disorder not otherwise specified, ED eating disorder, BMI body mass index, PTSD post-traumatic stress disorder, Personality disorder NOS not otherwise specified
^aThree missing values for BMI and 1 outlier for BMI < 42.73>
^bOne missing value for BMI and 5 outliers for BMI range < 32.41–44.29>

ISSN: 2050-2974