Table 4.
Summary of Percentages, Means, and Standard Deviations for Demographic and Clinical Characteristics by Trajectory Groups.
| Characteristic | Weight gain (N = 197), n (%) | Treatment resistant (N = 177), n (%) | Weight plateau (N = 82), n (%) | Weight fluctuate (N = 44), n (%) | ||
|---|---|---|---|---|---|---|
| Female | 190 (96.4) | 160 (90.4) | 79 (96.3) | 21 (47.7) | ||
| Male | 7 (3.6)a | 17 (9.6)a | 3 (3.7)a | 23 (52.3)a | ||
| Binge eating/purging | 58 (29.4) | 58 (32.8) | 18 (22.0) | 14 (31.8) | ||
| Restricting | 139 (70.6) | 119 (67.2) | 64 (78.0) | 30 (68.2) | ||
|
| ||||||
| M (SD) | M (SD) | M (SD) | M (SD) | F | p | |
|
| ||||||
| History of prior inpatient treatment for AN | 98 (49.7) | 75 (42.4) | 44 (53.7) | 17 (38.6) | 1.60 | NS |
| Duration of illness (years) | 9.4 (11.2)a | 8.4 (11.2)b | 12.1 (12.6)c | 3.2 (3.5)a,b,c | 5.25 | .002 |
| Readmitted to unit | 73 (37.1)a | 56 (31.6)a | 30 (36.6)a | 7 (15.9)a | 2.64 | .05 |
| Age (in years) | 27.6 (14.2)a | 26.7 (14.0)b | 28.4 (14.8)c | 20.5 (7.8)a,b,c | 3.71 | .01 |
| Admission | ||||||
| Body weight (kg) | 40.2 (2.4)a,d,e | 46.5 (2.2)b,d,f | 33.6 (2.7)a,b,c | 54.2 (3.6)c,e,f | 883.98 | <.001 |
| BMI | 15.5 (1.2) | 16.9 (1.0) | 14.2 (1.1) | 17.4 (.8) | 159.44 | <.001 |
| % of IBW | 74.7 (6.3) | 81.4 (5.7) | 69.1 (6.8) | 83.7 (5.5) | 104.24 | <.001 |
| Discharge | ||||||
| Body weight (kg) | 42.8 (2.3)a,d,e | 48.9 (2.5)b,d,f | 36.4 (3.1)a,b,c | 56.8 (4.3)c,e,f | 707.67 | <.001 |
| BMI at discharge | 16.5 (1.2) | 17.8 (1.2) | 15.4 (1.4) | 18.2 (1.1) | 98.16 | <.001 |
| % of IBW | 79.5 (6.3) | 85.6 (6.6) | 74.8 (7.3) | 87.8 (6.5) | 67.43 | <.001 |
| Admission caloric intake (kcal) | 1,877 (373) | 1,976 (441)a | 1,791 (334)a,b | 2,032 (398)b | 5.98 | <.001 |
| Length of stay (days) | 16.3 (12.3) | 13.8 (9.7)a | 19.0 (14.6)a | 17.1 (18.3) | 3.47 | .02 |
Note. AN = anorexia nervosa; BMI = body mass index (kg/m2); IBW = ideal body weight; NS = not statistically significant. Different superscripts denote statistically significant group differences after post hoc comparisons.