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Table 3 Mean values of depression symptoms of the obese subjects (pre- and post-LSG) and non-obese subjects on Beck’s depression scale (BDI-II)

From: Is neuregulin-1 (NRG-1) a potential blood biomarker linking depression to obesity? A case-control study

Depression Inventory (BDI-II)

Obese (n = 108)

Non-obese (n = 100)

Test of Sig.

P

Pre-LSG

Post LSG

• No depression (0–13)

55 (50.9%)

74 (68.5%)

82 (82.0%)

χ2 = 25.619*

 < 0.001*

• Mild depression (14–19)

25 (23.1%)

20 (18.5%)

12 12.0%)

• Moderate (20–28)

18 (16.7%)

12 (11.1%)

6 (6.0%)

• Severe (29–63)

10 (9.3%)

2 (1.9%)

0 (0.0%)

MH (p0)

95.500* (< 0.001*)

   

Total Score

 Mean ± SD.

14.68 ± 10.48

10.59 ± 7.30

8.21 ± 5.98

U = 3326.50*

< 0.001*

 Median (Min. – Max.)

13 (0–45)

9 (0–31)

8 (0–27)

Z (p0)

5.442* (< 0.001*)

   
  1. Test χ2 Chi square test, MH Marginal Homogeneity, P0P value for comparing between obese subjects pre- and post-LSG, SD Standard deviation, U Mann Whitney test, Z Wilcoxon signed ranks test
  2. *Statistically significant at p ≤ 0.05