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Is Adherence to Follow-Up After Bariatric Surgery Necessary? A Systematic Review and Meta-Analysis
by
van der Peet, Donald L.
,
Barendregt, Rosalie
,
de Vries, Ralph
in
Bariatric Surgery - methods
,
Follow-Up Studies
,
Gastrectomy
2022
The association of adherence to follow-up (FU) after laparoscopic gastric bypass — and gastric sleeve with weight loss (WL) is unclear. The aim of this study was to evaluate this association. Fourteen full text articles were included in the systematic review. Eight studies were included in the meta-analysis concerning FU up to 3 years postoperatively and 3 for the FU between 3 and 10 years postoperatively. Results showed a significant association between adherence to FU 0.5 to 3 years postoperatively and percentage excess WL (%EWL) but did not demonstrate a significant association between FU > 3 years postoperatively and total WL (%TWL). In conclusion, adherence to FU may not be associated with WL and therefore stringent lifelong FU in its current form should be evaluated.
Journal Article
Weight Loss Results and Compliance with Follow-up after Bariatric Surgery
by
Reiber Beata M M
,
Bruin, Sjoerd C
,
Bremer Marjolein J M
in
Gastrointestinal surgery
,
Risk factors
,
Vitamin deficiency
2021
PurposeThe importance of follow-up (FU) for midterm weight loss (WL) after bariatric surgery is controversial. Compliance to this FU remains challenging. Several risk factors for loss to FU (LtFU) have been mentioned. The aim was therefore to evaluate the association between WL and LtFU 3 to 5 years postoperatively and to identify risk factors for LtFU.Materials and MethodsA single-center cross-sectional study in the Netherlands. Between June and October 2018, patients scheduled for a 3-, 4-, or 5-year FU appointment were included into two groups: compliant (to their scheduled appointment and overall maximally 1 missed appointment) and non-compliant (missed the scheduled appointment and at least 1 overall). Baseline, surgical, and FU characteristics were collected and a questionnaire concerning socio-economic factors.ResultsIn total, 217 patients in the compliant group and 181 in the non-compliant group were included with a median body mass index at baseline of 42.0 and 42.9 respectively. Eighty-eight percent underwent a laparoscopic Roux-en-Y gastric bypass. The median percentage total weight loss for the compliant and non-compliant groups was 30.7% versus 28.9% at 3, 29.3% versus 30.2% at 4, and 29.6% versus 29.9% at 5 years respectively, all p>0.05. Age, persistent comorbidities and vitamin deficiencies, a yearly salary <20,000 euro, no health insurance coverage, and not understanding the importance of FU were risk factors for LtFU.ConclusionThree to 5 years postoperatively, there is no association between LtFU and WL. The compliant group demonstrated more comorbidities and vitamin deficiencies. Younger age, not understanding the importance of FU, and financial challenges were risk factors for LtFU.
Journal Article
Selection Bias Due to Loss to Follow Up in Cohort Studies
by
Napravnik, Sonia
,
Lau, Bryan
,
Cole, Stephen R.
in
Adult
,
Cohort Studies
,
Data Interpretation, Statistical
2016
Selection bias due to loss to follow up represents a threat to the internal validity of estimates derived from cohort studies. Over the past 15 years, stratification-based techniques as well as methods such as inverse probability-of-censoring weighted estimation have been more prominently discussed and offered as a means to correct for selection bias. However, unlike correcting for confounding bias using inverse weighting, uptake of inverse probability-of-censoring weighted estimation as well as competing methods has been limited in the applied epidemiologic literature. To motivate greater use of inverse probability-of-censoring weighted estimation and competing methods, we use causal diagrams to describe the sources of selection bias in cohort studies employing a time-to-event framework when the quantity of interest is an absolute measure (e.g., absolute risk, survival function) or relative effect measure (e.g., risk difference, risk ratio). We highlight that whether a given estimate obtained from standard methods is potentially subject to selection bias depends on the causal diagram and the measure. We first broadly describe inverse probability-of-censoring weighted estimation and then give a simple example to demonstrate in detail how inverse probability-of-censoring weighted estimation mitigates selection bias and describe challenges to estimation. We then modify complex, real-world data from the University of North Carolina Center for AIDS Research HIV clinical cohort study and estimate the absolute and relative change in the occurrence of death with and without inverse probability-of-censoring weighted correction using the modified University of North Carolina data. We provide SAS code to aid with implementation of inverse probability-of-censoring weighted techniques.
Journal Article
Azacitidine and Venetoclax in Previously Untreated Acute Myeloid Leukemia
by
Garcia, Jacqueline S
,
Porkka, Kimmo
,
Havelange, Violaine
in
Acute myeloid leukemia
,
Aged
,
Aged, 80 and over
2020
In more than 400 older patients with AML who could not receive myeloablative therapy, the incidence of composite complete remission was higher (66.4% vs. 28.3) and the median overall survival was longer (14.7 vs. 9.6 months) among patients who received azacitidine plus venetoclax (a B-cell lymphoma 2 antagonist) than among those who received azacitidine alone.
Journal Article
Preferences for Follow-Up Procedures among Patients Lost to Follow-Up after Smoking Cessation Intervention among Therapists—An Interview Study
2024
Achieving high follow-up rates after smoking cessation interventions (SCIs) is a general challenge. The aim of this study was to identify preferences among patients and therapists for improving follow-up rates and to assess smoking status at 6 months among patients lost to follow-up. From the Danish STOPbase for Tobacco and Nicotine, which collects data on SCI across health care, 20 representative patients lost to follow-up by routine procedures were identified together with 11 therapists. All participated in individual semi-structured phone interviews, which for patients also included 6-month smoking status. Deductive and inductive analyses were performed. Four themes emerged from the analyses with several subthemes, all regarding contacts. Both patients and therapists preferred to intensify the follow-up process by boosting it with additional attempts and using voice messages, e-mail and/or SMS, calling at specified times of the day and avoiding calls from unknown numbers. In addition, some patients mentioned that they were busy or were not carrying their mobile devices at the time of a call as a barrier. Some therapists mentioned that barriers could include an expectation of relapse, but also a poor mental state, the time of day and patient fear of public systems. Among the patients originally lost to follow-up, 35% (95% CI 16%–59%) experienced continuous smoking cessation for 6 months, and the overall national rate was 22% (21.6–23.3%). In conclusion, both patients and therapists preferred intensified follow-up. The 6-month smoking status for patients lost to follow-up seemed to be similar to that of the routinely followed-up patients. These findings will be examined experimentally in a larger study.
Journal Article
Pre-diagnosis and pre-treatment loss to follow-up and associated factors among patients with presumed tuberculosis and those diagnosed in Uganda
2024
Background
Loss to follow-up (LTFU) of patients with presumed tuberculosis (TB) before completing the diagnostic process (pre-diagnosis LTFU) and before initiating treatment for those diagnosed (pre-treatment LTFU) is a challenge in the realization of the End TB Strategy. We assessed the proportion of pre-diagnosis and pre-treatment LTFU and associated factors among patients with presumed TB and those diagnosed in the selected health facilities.
Methods
This was a retrospective cohort study involving a review of routinely collected data from presumptive, laboratory and TB treatment registers from January 2019 to December 2022. The study was conducted in three general hospitals and one lower-level health center IV in Central Uganda. We defined pre-diagnosis LTFU as failure to test for TB and obtain results within 30 days from the date of being presumed and pre-treatment LTFU as failure to initiate TB treatment within 14 days from the date of diagnosis. Modified Poisson regression was used to estimate prevalence ratios (PRs) and 95% confidence intervals (CIs) of factors associated with pre-diagnosis and pre-treatment LTFU.
Results
Of the 13,064 patients with presumed TB, 39.9% were aged 25 to 44 years, and 57.1% were females. Almost a third, 28.3% (3,699/13.064) experienced pre-diagnosis LTFU and 13.7% (163/1187) did not initiate treatment within 14 days from being diagnosed. Pre-diagnosis LTFU was more likely to occur among patients aged 0-14 years (adj PR 1.1, 95% CI: 1.06,1.24), females (adj.PR=1.06, 95% CI: 1.01, 1.12) and those with no record of place of residence (adj. PR=2.7, 95% CI: 2.54, 2.93). In addition, patients with no record of phone contact were more likely to be LTFU, (adj. PR=1.1, 95% CI: 1.05, 1.17). Pre-treatment LTFU was also more likely among patients with no record of place of residence (adj PR 7.1, 95% CI: 5.13,9.85) and those with no record of phone contact (adj PR 2.2, 95% CI: 1.63,2.86). Patients presumed from the HIV clinics were 40% less likely to experience pre-treatment LTFU compared to those in the outpatient departments (adj PR 0.6, 95% CI: 0.41,0.88).
Conclusion
High proportions of pre-diagnosis and pre-treatment LTFU were observed in this study. This calls for urgent interventions at these time points in the TB care cascade to be able to realise the End TB Strategy.
Journal Article
American Cancer Society/American Society of Clinical Oncology Breast Cancer Survivorship Care Guideline
2016
The purpose of the American Cancer Society/American Society of Clinical Oncology Breast Cancer Survivorship Care Guideline is to provide recommendations to assist primary care and other clinicians in the care of female adult survivors of breast cancer. A systematic review of the literature was conducted using PubMed through April 2015. A multidisciplinary expert workgroup with expertise in primary care, gynecology, surgical oncology, medical oncology, radiation oncology, and nursing was formed and tasked with drafting the Breast Cancer Survivorship Care Guideline. A total of 1073 articles met inclusion criteria; and, after full text review, 237 were included as the evidence base. Patients should undergo regular surveillance for breast cancer recurrence, including evaluation with a cancer-related history and physical examination, and should be screened for new primary breast cancer. Data do not support performing routine laboratory tests or imaging tests in asymptomatic patients to evaluate for breast cancer recurrence. Primary care clinicians should counsel patients about the importance of maintaining a healthy lifestyle, monitor for post-treatment symptoms that can adversely affect quality of life, and monitor for adherence to endocrine therapy. Recommendations provided in this guideline are based on current evidence in the literature and expert consensus opinion. Most of the evidence is not sufficient to warrant a strong evidence-based recommendation. Recommendations on surveillance for breast cancer recurrence, screening for second primary cancers, assessment and management of physical and psychosocial long-term and late effects of breast cancer and its treatment, health promotion, and care coordination/practice implications are made.
Journal Article
Asciminib in Chronic Myeloid Leukemia after ABL Kinase Inhibitor Failure
2019
Asciminib, a novel ABL tyrosine kinase inhibitor that targets the myristoyl site of the molecule rather than the ATP-binding domain, showed mainly low-grade toxic effects in a minority of patients and considerable antileukemic activity in the majority of those who had resistance to or unacceptable side effects from standard TKIs.
Journal Article
Calculating follow-up completeness: a comparison of multiple methods under different simulated scenarios and a use case
by
van Rooij, Frank J.A.
,
Kluin, Jolanda
,
van der Ven, Carlijn C.E.M.
in
Clinical trials
,
Cohort analysis
,
Cohort Studies
2025
Completeness of follow-up is a crucial aspect of data quality in cohort studies and clinical trials. This study aims to provide an overview of different methods to calculate follow-up completeness. In addition, the performance of these methods is tested in several scenarios using simulated datasets and a use case, with the aim of guiding researchers in selecting the most appropriate method for their data.
The literature was searched for methods of quantification of follow-up completeness. These methods were investigated in simulated datasets, in which the true completeness of follow-up was known. A total of 27 different scenarios were investigated, based on different survival distributions, total proportions of dropout of participants, and different time points of dropout. The methods were also investigated using real-world mortality data from the population-based Rotterdam Study cohort. Kaplan–Meier curves were used to depict observed survival, and completeness of follow-up was calculated in percentages using a freely available GitHub package developed by our research group.
In total, six methods were found in the literature for quantification of follow-up completeness. Overall, two methods (the simplified person-time method and the modified Clark's Completeness Index C∗) were closest to the true follow-up completeness in the 27 scenarios.
Researchers should make attempts to report follow-up completeness. This simulation study may assist researchers in selecting the most appropriate method to calculate follow-up completeness in different scenarios.
•The Simplified Person-Time Method (SPT) performs best in most simulated scenarios.•This study provides an overview of when to use each method, depending on the dataset.•Researchers should make attempts to report follow-up completeness and methods used.
Journal Article
Pembrolizumab plus Chemotherapy in Metastatic Non–Small-Cell Lung Cancer
2018
The addition of pembrolizumab to chemotherapy for metastatic lung cancer without
EGFR
or
ALK
mutations resulted in better progression-free and overall survival than chemotherapy alone. Immune-related adverse effects were more common with the combination.
Journal Article