Evidence map›Paper›PMID 18997674›Full record

ArticleObesity (Silver Spring, Md.)2009

Capacity for physical activity predicts weight loss after Roux-en-Y gastric bypass.

Ida J Hatoum, Heather K Stein, Benjamin F Merrifield, Lee M Kaplan

Abstract read
In one paragraph

Article in Obesity (Silver Spring, Md.), 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 46 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
46citing papers in PubMed, 4 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

46 citing papers in PubMed, 4 syntheses or guidelines pooled it.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Ida J HatoumDepartment of Medicine, Massachusetts General Hospital and Harvard Medical School, MGH Weight Center, Boston, Massachusetts, USA.
Heather K Stein
Benjamin F Merrifield
Lee M Kaplan

Funding

Pilot & Feasibility ProgramP30DK043351 · NIDDK · MASSACHUSETTS GENERAL HOSPITAL · PI RAYMOND T CHUNG · 1991 to 2026
$35.3M
Transgenic CoreP30DK046200 · NIDDK · TUFTS MEDICAL CENTER · PI GREENBERG, ANDREW S, PERISSI, VALENTINA · 1992 to 2021
$25.0M
ALIMENTARY TRACT RESEARCH IN HEALTH AND DISEASET32DK007533 · NIDDK · BRIGHAM AND WOMEN'S HOSPITAL · PI BLUMBERG, RICHARD S · 1986 to 2020
$5.3M
WEIGHTCONNECTION-- WEIGHT LOSS MAINTANANCE USING THE WEBR01DK057478 · NIDDK · MASSACHUSETTS GENERAL HOSPITAL · PI KAPLAN, LEE MICHAEL · 1999 to 2001
$431k
NIDDK NIH HHS DK007533NIDDK NIH HHS DK043351NIDDK NIH HHS DK046200NIDDK NIH HHS DK057478NIDDK NIH HHS P30 DK043351NIDDK NIH HHS P30 DK046200NIDDK NIH HHS R01 DK057478
6 · The paper itself

Abstract

Despite its overall excellent outcomes, weight loss after Roux-en-Y gastric bypass (RYGB) is highly variable. We conducted this study to identify clinical predictors of weight loss after RYGB. We reviewed charts from 300 consecutive patients who underwent RYGB from August 1999 to November 2002. Data collected included patient demographics, medical comorbidities, and diet history. Of the 20 variables selected for univariate analysis, 9 with univariate P values <or= 0.15 were entered into a multivariable regression analysis. Using backward selection, covariates with P < 0.05 were retained. Potential confounders were added back into the model and assessed for effect on all model variables. Complete records were available for 246 of the 300 patients (82%). The patient characteristics were 75% female, 93% white, mean age of 45 years, and mean initial BMI of 52.3 kg/m(2). One year after surgery, patients lost an average of 64.8% of their excess weight (s.d. = 20.5%). The multivariable regression analysis revealed that limited physical activity, higher initial BMI, lower educational level, diabetes, and decreased attendance at postoperative appointments had an adverse effect on weight loss after RYGB. A model including these five factors accounts for 41% of the observed variability in weight loss (adjusted r(2) = 0.41). In this cohort, higher initial BMI and limited physical activity were the strongest predictors of decreased excess weight loss following RYGB. Limited physical activity may be particularly important because it represents an opportunity for potentially meaningful pre- and postsurgical intervention to maximize weight loss following RYGB.

Indexed as

Gastric BypassMotor ActivityWeight LossAdultAge of OnsetComorbidityEmploymentFemaleHumansMaleMarital StatusMiddle AgedObesity, MorbidPatient ComplianceProspective StudiesRetrospective Studies

Identifiers

PMID18997674
PMCPMC4226065

What OpenQuestion holds

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Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.