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Table 2 Comparison of postoperative BRI and BMI trajectory changes across bariatric procedures

From: Body roundness index trajectories in Chinese bariatric surgery patients: a retrospective longitudinal study

Variables

Surgical Procedures

Single time point

Inter-group comparison

overall comparison

Main effects (time)

Between-subject effects

interaction effects (time * operation)

SG

RYGB

t

P

F

P

F

P

F

P

BRI

T0

7.69 ± 1.98

7.51 ± 2.11

0.694

0.488

637.811

< 0.001*

3519.104

< 0.001*

0.764

0.463

T3

5.12 ± 1.72

5.17 ± 1.85

0.179

0.858

T12

3.65 ± 1.36

3.72 ± 1.24

0.383

0.702

BMI

T0

37.50 ± 6.11

36.62 ± 5.66

1.113

0.266

1346.656

< 0.001*

11385.454

< 0.001*

3.525

0.048*

T3

29.15 ± 4.67

29.08 ± 4.09

0.110

0.912

T12

25.42 ± 3.56

25.72 ± 2.96

0.649

0.516

  

SG

SG + JJB

        

BRI

T0

7.69 ± 1.98

9.69 ± 2.43

9.744

< 0.001*

1825.404

< 0.001*

8436.727

< 0.001*

46.663

< 0.001*

T3

5.12 ± 1.72

6.36 ± 1.98

7.504

< 0.001*

T12

3.65 ± 1.36

4.11 ± 1.45

3.648

< 0.001*

BMI

T0

37.50 ± 6.11

43.61 ± 6.55

10.879

< 0.001*

3925.294

< 0.001*

24936.012

< 0.001*

98.090

< 0.001*

T3

29.15 ± 4.67

33.49 ± 5.47

9.259

< 0.001*

T12

25.42 ± 3.56

26.98 ± 3.92

4.538

< 0.001*

  

SG

SADI-S

        

BRI

T0

7.69 ± 1.98

8.85 ± 2.66

2.461

0.019*

453.804

< 0.001*

1962.977

< 0.001*

4.853

0.009*

T3

5.12 ± 1.72

5.83 ± 2.01

2.202

0.028*

T12

3.65 ± 1.36

3.88 ± 1.50

0.908

0.365

BMI

T0

37.50 ± 6.11

40.85 ± 9.47

1.994

0.054

808.079

< 0.001*

5719.671

< 0.001*

4.712

0.020*

T3

29.15 ± 4.67

32.11 ± 6.56

2.538

0.016*

T12

25.42 ± 3.56

26.86 ± 4.91

1.642

0.110

  1. Notes: *indicates P < 0.05. Abbreviations: SG, sleeve gastrectomy; RYGB, Roux-en-Y gastric bypass; SG + JJB, SG plus jejunojejunal bypass; SADI-S, single anastomosis duodeno-ileal bypass with SG; BRI, body roundness index; BMI, body mass index; T0, baseline; T3, 3 months post-surgery; T12, 12 months post-surgery