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. 2021 Mar 17;11:6534. doi: 10.1038/s41598-021-86221-2

Author Correction: Cholecystectomy - a potential selection bias in studies assessing the metabolic effects of bariatric surgeries

Natasha Mendonça Machado 1,#, Camila de Siqueira Cardinelli 1,✉,#, Tong Shen 2, Marco Aurélio Santo 3, Raquel Susana Torrinhas 1, Dan Linetzky Waitzberg 1,3
PMCID: PMC7969730  PMID: 33731786

Correction to: Scientific Reports 10.1038/s41598-020-66688-1, published online 30 June 2020

This Article contains errors in the average and standard deviation calculations of postoperative weight patients for the effect of Roux-en-Y gastric bypass reported in Table 1.

The ‘Weight (kg)’ value for ‘Postoperative’ patients ‘With cholecystectomy (n = 7),’

“112.3 ± 10.89”

should read:

“95 ± 10.55”

Additionally, the ‘Weight (kg)’ value for ‘Postoperative’ patients ‘Without cholecystectomy (n = 21),’

“108.17 ± 14.50”

should read:

“90.7 ± 12.40”

The correct Table 1 appears below:

Table 1.

A corrected version of Table 1. Data are expressed by mean ± standard deviation, except the data on insulin levels, which are expressed as median (interquartile ranges). Bold p values highlight the clinical variables that responded to RYGB at different significant levels in patients with or without cholecystectomy. BMI, body mass index; HbA1c%, glycated hemoglobin; HDL, high density lipoproteins; LDL, low density lipoproteins; VLDL, very low-density lipoproteins.

Variables With cholecystectomy (n = 7) Without cholecystectomy (n = 21)
Preoperative Postoperative p value Preoperative Postoperative p value
Weight (kg) 117.28 ± 13.10 95 ± 10.55  < 0.050 111.81 ± 16.20 90.7 ± 12.40  < 0.050
BMI (kg/m2) 47.00 ± 4.60 45.80 ± 3.90  < 0.050 44.40 ± 6.00 43.00 ± 5.30  < 0.050
% Body Fat 50.30 ± 9.70 48.77 ± 4.70 0.937 51.83 ± 5.50 43.51 ± 6.30  < 0.050
% Lean mass 49.60 ± 9.70 51.22 ± 4.70 0.219 48.17 ± 5.50 56.49 ± 6.30  < 0.050
Body fat (kg) 59.10 ± 15.30 46.47 ± 8.00 0.469 57.96 ± 13.16 39.44 ± 9.90  < 0.050
Lean mass (kg) 56.90 ± 7.80 48.53 ± 5.90 0.297 52.93 ± 6.80 50.16 ± 5.90  < 0.050
Glucose (mg/dL) 195.40 ± 89.20 102 ± 27.70  < 0.050 223.76 ± 67.80 102.68 ± 18.90  < 0.050
Insulin (µU/mL) 18.10 (13.50–20.90) 7.8 (6.30–16.70)  < 0.050 16.30 (13.45–25.40) 7.9 (6.90–12.70)  < 0.050
%HbA1c 8.30 ± 1.90 5.9 ± 0.50  < 0.050 9.08 ± 1.50 6.01 ± 0.40  < 0.050
C peptide (ng/mL) 3.60 ± 0.90 2.64 ± 0.57 0.109 4.21 ± 1.40 3.01 ± 0.97  < 0.050
Cholesterol total (mg/dL) 178.10 ± 42.10 151.28 ± 27.00 0.297 200.71 ± 32.40 166.84 ± 56.50  < 0.050
HDL (mg/dL) 40.20 ± 11.08 44.14 ± 11.60 0.202 44.81 ± 9.35 42.10 ± 8.90  < 0.050
LDL (mg/dL) 108.80 ± 36.50 87.85 ± 22.10 0.352 121.57 ± 33.62 101.2 ± 43.65  < 0.050
VLDL (mg/dL) 29.00 ± 9.90 19.28 ± 3.30 0.156 29.58 ± 9.67 23.52 ± 10.54 0.078
Triglycerides (mg/dL) 145.10 ± 49.00 96.42 ± 16.80 0.156 175.5 ± 103 117.94 ± 52.70  < 0.050

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