User profiles for Rolf H.H. Groenwold
Rolf Groenwoldprofessor of Clinical Epidemiology, LUMC, Leiden University Verified email at lumc.nl Cited by 13850 |
Overestimation of risk ratios by odds ratios in trials and cohort studies: alternatives to logistic regression
…, A Algra, JP Vandenbroucke, RHH Groenwold - Cmaj, 2012 - Can Med Assoc
Analysis domly assigned to groups receiving surgery followed by radiotherapy, or radiotherapy
alone. 12 The primary outcome was the ability to walk, which occurred in 70.3% of the …
alone. 12 The primary outcome was the ability to walk, which occurred in 70.3% of the …
Missing covariate data in clinical research: when and when not to use the missing-indicator method for analysis
If missingness of a variable is related to observed characteristics but not to unobserved
characteristics, the data are (confusingly) called “missing at random.” 2, 5, 6 If data are missing at …
characteristics, the data are (confusingly) called “missing at random.” 2, 5, 6 If data are missing at …
Get real in individual participant data (IPD) meta‐analysis: a review of the methodology
…, N Hummel, RHH Groenwold… - Research synthesis …, 2015 - Wiley Online Library
Individual participant data (IPD) meta‐analysis is an increasingly used approach for
synthesizing and investigating treatment effect estimates. Over the past few years, numerous …
synthesizing and investigating treatment effect estimates. Over the past few years, numerous …
Attributable mortality of ventilator-associated pneumonia: a meta-analysis of individual patient data from randomised prevention studies
WG Melsen, MM Rovers, RHH Groenwold… - The Lancet infectious …, 2013 - thelancet.com
Background Estimating attributable mortality of ventilator-associated pneumonia has been
hampered by confounding factors, small sample sizes, and the difficulty of doing relevant …
hampered by confounding factors, small sample sizes, and the difficulty of doing relevant …
Estimating measures of interaction on an additive scale for preventive exposures
MJ Knol, TJ VanderWeele, RHH Groenwold… - European journal of …, 2011 - Springer
Measures of interaction on an additive scale (relative excess risk due to interaction [RERI],
attributable proportion [AP], synergy index [S]), were developed for risk factors rather than …
attributable proportion [AP], synergy index [S]), were developed for risk factors rather than …
Dealing with missing outcome data in randomized trials and observational studies
RHH Groenwold, ART Donders… - American journal of …, 2012 - academic.oup.com
Although missing outcome data are an important problem in randomized trials and observational
studies, methods to address this issue can be difficult to apply. Using simulated data, …
studies, methods to address this issue can be difficult to apply. Using simulated data, …
Do self-management interventions work in patients with heart failure? An individual patient data meta-analysis
NH Jonkman, H Westland, RHH Groenwold, S Ågren… - Circulation, 2016 - Am Heart Assoc
Background— Self-management interventions are widely implemented in the care for patients
with heart failure (HF). However, trials show inconsistent results, and whether specific …
with heart failure (HF). However, trials show inconsistent results, and whether specific …
Operative treatment versus nonoperative treatment of Achilles tendon ruptures: systematic review and meta-analysis
…, M Heng, O van der Meijden, RHH Groenwold… - Bmj, 2019 - bmj.com
Objectives To compare re-rupture rate, complication rate, and functional outcome after
operative versus nonoperative treatment of Achilles tendon ruptures; to compare re-rupture rate …
operative versus nonoperative treatment of Achilles tendon ruptures; to compare re-rupture rate …
Reporting of covariate selection and balance assessment in propensity score analysis is suboptimal: a systematic review
MS Ali, RHH Groenwold, SV Belitser… - Journal of clinical …, 2015 - Elsevier
Objectives To assess the current practice of propensity score (PS) analysis in the medical
literature, particularly the assessment and reporting of balance on confounders. Study Design …
literature, particularly the assessment and reporting of balance on confounders. Study Design …
Performance of the original EuroSCORE
S Siregar, RHH Groenwold, F de Heer… - European journal of …, 2012 - academic.oup.com
The European system for cardiac operative risk evaluation (EuroSCORE) is a commonly
used risk score for operative mortality following cardiac surgery. We aimed to conduct a …
used risk score for operative mortality following cardiac surgery. We aimed to conduct a …