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Table 1 Comparison of AN patients, split into typical (BMI < 18.5 kg/m2) and atypical groups (BMI ≥ 18.5 kg/m2) and a community-based non-clinical group, showing means and standard deviations (M(SD)), 95 % confidence intervals, individual F-test results from MANOVA and partial effect sizes of differences between groups

From: Dysfunctional metacognition and drive for thinness in typical and atypical anorexia nervosa

 

Typical AN

Atypical AN

CNC

  

(n = 75)

(n = 44)

(n = 100)

Measures

M(SD)

95 % CI

M(SD)

95 % CI

M(SD)

95 % CI

F(2,216)

Partial η2

DFT

18.5(7.6)

16.9 – 20.1

21.0a(5.8)

18.9 – 23.1

4.9***(4.4)

3.7 – 6.1

164.0

.603

MCQ-CC

12.7(5.0)

11.6 – 13.9

12.3(5.2)

10.8 – 13.8

9.3***(3.5)

8.4 – 10.1

15.1

.123

MCQ-PBW

10.9(4.8)

9.7 – 12.1

12.0(5.9)

10.4 – 13.6

9.1b***(3.8)

8.1 –10.0

7.2

.062

MCQ-CSC

17.5(4.2)

16.5 – 18.5

16.8(4.6)

15.5 – 18.1

13.3***(5.0)

12.4 – 14.2

19.6

.154

MCQ-NBW

17.8(4.7)

16.7 – 18.9

17.8(5.0)

16.4 – 18.3

8.7***(3.7)

7.9 – 9.6

119.6

.526

MCQ-NCT

15.2(5.0)

14.0 – 16.3

16.0(5.1)

14.5 – 17.5

8.7***(3.1)

7.9 – 9.6

68.3

.387

  1. Note. DFT: Drive for Thinness subscale of the Eating Disorders Inventory-3 [29]; MCQ-30: Metacognitions Questionnaire—Brief Version [51] with MCQ-CC: Cognitive Confidence, MCQ-PBW: Positive Beliefs About Worry, MCQ-CSC: Cognitive Self-Consciousness, MCQ-NBW: Negative Beliefs about Worry and MCQ-NCT: Need to Control Thoughts
  2. Partial η2 < .01 small, <.06 medium and < .14 large [57]
  3. *p < .05, **p < .01, ***p < .001 comparing the community group with both AN groups
  4. a p < .05 comparing typical with atypical AN. b p < .01 comparing the community group with typical AN