Table 2 Associations between changes in body composition and basal metabolic rate for patients and comparator groups at 3-months, 12-months and 24-months post gastric bypass-surgery.

From: Metabolic adaptation following gastric bypass surgery: results from a 2-year observational study

 

3-months post-surgery

12-months post-surgery

24-months post-surgery

Patients

(n 20)

Comparator group (n 24)

Patients

(n 25)

Comparator group

(n 21)

Patients

(n 25)

Comparator group

(n 17)

ΔBMR (MJ/day)

ΔBMR (MJ/day)

ΔBMR (MJ/day)

ΔFM (kg)

0.20 (95%CI: −0.27 to 0.59; p = 0.40)

0.23 (95% CI: −0.19 to 0.58; p = 0.28)

0.65a (95% CI: 0.35 to 0.83; p = 0.00041)

0.25 (95% CI: −0.21 to 0.61; p = 0.28)

0.64 a (95% CI: 0.33 to 0.83; p = 0.00053)

0.04 (95% CI: −0.45 to 0.51; p = 0.89)

ΔFFM (kg)

0.33 (95% CI: −0.14 to 0.67; p = 0.16)

−0.20 (95% CI: −0.56 to 0.23; p = 0.36)

0.45 a (95% CI: 0.06 to 0.72; p = 0.025)

−0.13 (95% CI: −0.53 to 0.32; p = 0.60)

0.50a (95% CI: 0.13 to 0.74; p = 0.012)

−0.02 (95% CI: −0.49 to 0.47; p = 0.94)

Δ%FFM/weight kg

−0.11 (95% CI: −0.53 to 0.35; p = 0.64)

0.24 (95% CI: −0.18 to 0.58; p = 0.27)

0.50 a (95% CI: 0.13 to 0.75; p = 0.010)

0.26 (95% CI: −0.20 to 0.62; p = 0.26)

0.50 a (95% CI: 0.13 to 0.75; p = 0.011)

0.09 (95% CI: −0.41 to 0.55; p = 0.72)

  1. Associations analysed using Pearson’s correlation. Data presented as r (correlation coefficient) with 95% confidence interval (CI).
  2. BMR Basal Metabolic Rate, FM Fat Mass, FFM Fat-Free Mass, Δ Change values from baseline.
  3. aDenotes P < 0.05 indicating a statistically significant correlation value.
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