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Table 2 Results from multiple linear regression models of the effect on change in SF-36 domains from baseline to 6 months and 2 years (outcomes) of a one-percentage-point decrease in weight, BMI, and HbA1c from baseline to 6 months and 2 years (predictors)

From: Quality of life after gastric bypass surgery in patients with type 2 diabetes: patients’ experiences during 2 years of follow-up

Outcome

Predictor

6 month follow-up

2 year follow-up

Adjusted β (95% CI)b

P value

Adjusted β (95% CI)b

P value

ΔPF

Weight decrease (%)

 − 2.24 (− 5.63; 1.16)

0.171

 − 0.01 (− 1.55; 1.52)

0.983

ΔRP

Weight decrease (%)

 − 4.60 (4.01; − 1.21)

0.257

0.12 (− 4.40; 4.64)

0.952

ΔBP

Weight decrease (%)

 − 4.43 (− 8.54; − 0.32)

0.037

0.40 (− 3.71; 4.51)

0.829

ΔGH

Weight decrease (%)

 − 3.55 (− 8.38; 1.30)

0.131

 − 1.60 (− 4.50; 1.30)

0.239

ΔVT

Weight decrease (%)

 − 2.50 (− 6.90; 1.94)

0.236

 − 1.36 (− 3.10; 0.39)

0.111

ΔSF

Weight decrease (%)

0.71 (− 2.49; 3.91)

0.626

 − 1.99 (− 4.51; 0.52)

0.105

ΔEF

Weight decrease (%)

 − 5.15 (− 8.25; − 2.04)

0.005

 − 0.40 (− 3.97; 3.16)

0.801

ΔMH

Weight decrease (%)

 − 0.68 (− 3.20; 1.83)

0.553

 − 0.13 (− 1.10; 0.84)

0.770

ΔPF

BMI decrease (%)

 − 2.12 (− 5.12; 0.88)

0.144

0.14 (− 1.27; 1.55)

0.824

ΔRP

BMI decrease (%)

 − 6.83 (− 15.00; 1.33)

0.091

0.60 (− 3.62; 4.81)

0.753

ΔBP

BMI decrease (%)

 − 6.34 (− 10.92; − 1.76)

0.012

0.45 (− 3.41; 4.31)

0.795

ΔGH

BMI decrease (%)

 − 2.53 (− 6.97; 1.92)

0.230

 − 0.53 (− 4.05; 1.46)

0.309

ΔVT

BMI decrease (%)

 − 3.42 (− 7.50; 0.65)

0.900

 − 1.20 (0.56; − 1.57)

0.154

ΔSF

BMI decrease (%)

0.11 (− 3.25; 3.48)

0.941

 − 2.14 (− 4.47; 0.20)

0.067

ΔEF

BMI decrease (%)

 − 3.31 (− 6.75; 0.14)

0.058

 − 0.17 (− 3.47; 3.13)

0.908

ΔMH

BMI decrease (%)

 − 0.73 (− 2.90; 1.44)

0.467

 − 0.14 (− 1.04; 0.77)

0.740

ΔPF

HbA1c decrease (%)

 − 1.95 (1.81; 1.42)

0.791

 − 0.17 (− 1.04; 0.70)

0.666

ΔRP

HbA1c decrease (%)

-1.80 (1.16; 1.8)

0.34

−2.99 (-1.70; 2.62)

0.025

ΔBP

HbA1c decrease (%)

 − 0.78 (− 3.42; 1.85)

0.518

0.09 (− 2.83; 3.01)

0.073

ΔGH

HbA1c decrease (%)

 − 0.69 (− 2.98; 1.60)

0.512

0.01 (− 2.22; 2.20)

0.996

ΔVT

HbA1c decrease (%)

 − 1.05 (− 2.56; 0.45)

0.145

 − 1.05 (− 2.56; 0.45)

0.145

ΔSF

HbA1c decrease (%)

 − 0.94 (− 2.43; 0.55)

0.190

 − 1.91 (− 3.91; 0.08)

0.058

ΔEF

HbA1c decrease (%)

4.98 (− 1.25; 2.24)

0.988

1.61 (− 0.98; 4.20)

0.189

ΔMH

HbA1c decrease (%)

 − 0.57 (− 1.45; 0.31)

0.177

0.245 (− 0.48; 0.97)

0.460

  1. Italic indicates significant p values
  2. aChange from baseline to follow-up in Physical functioning (PF), Role functioning/physical (RP), Pain (BP), General health (GH), Energy/fatigue (VT), Social functioning (27), Role functioning/emotional (EF, and Emotional well-being (MH)
  3. bAdjusted for values of outcome and predictor variables at baseline