Assessing the impact of confounding (measured and unmeasured) in a case-control study to examine the increased risk of pandemic A/H1N1 associated with receipt of the 2008-9 seasonal influenza vaccineROSELLA, Laura C; GROENWOLD, Rolf H. H; CROWCROFT, Natasha S et al.Vaccine. 2011, Vol 29, Num 49, pp 9194-9200, issn 0264-410X, 7 p.Article

Selection of confounding variables should not be based on observed associations with exposureGROENWOLD, Rolf H. H; KLUNGEL, Olaf H; GROBBEE, Diederick E et al.European journal of epidemiology. 2011, Vol 26, Num 8, pp 589-593, issn 0393-2990, 5 p.Article

Performance of the original EuroSCORESIREGAR, Sabrina; GROENWOLD, Rolf H. H; DE HEER, Frederiek et al.European journal of cardio-thoracic surgery. 2012, Vol 41, Num 4, pp 746-754, issn 1010-7940, 9 p.Article

Dealing With Missing Outcome Data in Randomized Trials and Observational StudiesGROENWOLD, Rolf H. H; DONDERS, A. Rogier T; ROES, Kit C. B et al.American journal of epidemiology. 2012, Vol 175, Num 3, pp 210-217, issn 0002-9262, 8 p.Article

Exploring interaction effects in small samples increases rates of false-positive and false-negative findings: results from a systematic review and simulation studySCHMIDT, Amand F; GROENWOLD, Rolf H. H; KNOL, Mirjam J et al.Journal of clinical epidemiology. 2014, Vol 67, Num 7, pp 821-829, issn 0895-4356, 9 p.Article

Estimating measures of interaction on an additive scale for preventive exposuresKNOL, Mirjam J; VANDERWEELE, Tyler J; GROENWOLD, Rolf H. H et al.European journal of epidemiology. 2011, Vol 26, Num 6, pp 433-438, issn 0393-2990, 6 p.Article

Comparing HAMD₁₇ and HAMD subscales on their ability to differentiate active treatment from placebo in randomized controlled trialsBOESSEN, Ruud; GROENWOLD, Rolf H. H; KNOL, Mirjam J et al.Journal of affective disorders. 2013, Vol 145, Num 3, pp 363-369, issn 0165-0327, 7 p.Article

Limitations of Ranking Lists Based on Cardiac Surgery Mortality RatesSIREGAR, Sabrina; GROENWOLD, Rolf H. H; JANSEN, Evert K et al.Circulation. Cardiovascular quality and outcomes (Print). 2012, Vol 5, Num 3, pp 403-409, issn 1941-7713, 7 p.Article

Classifying responders and non-responders; does it help when there is evidence of differentially responding patient groups?BOESSEN, Ruud; GROENWOLD, Rolf H. H; KNOL, Mirjam J et al.Journal of psychiatric research. 2012, Vol 46, Num 9, pp 1169-1173, issn 0022-3956, 5 p.Article

Reporting of treatment effects from randomized trials: A plea for multivariable risk ratiosGROENWOLD, Rolf H. H; MOONS, Karel G. M; PEELEN, Linda M et al.Contemporary clinical trials. 2011, Vol 32, Num 3, pp 399-402, issn 1551-7144, 4 p.Article

Differences in interaction and subgroup-specific effects were observed between randomized and nonrandomized studies in three empirical examplesSCHMIDT, Amand F; ROVERS, Maroeska M; KLUNGEL, Olaf H et al.Journal of clinical epidemiology. 2013, Vol 66, Num 6, pp 599-607, issn 0895-4356, 9 p.Article

Justification of exclusion criteria was underreported in a review of cardiovascular trialsSCHMIDT, Amand F; GROENWOLD, Rolf H. H; VAN DELDEN, Johannes J. M et al.Journal of clinical epidemiology. 2014, Vol 67, Num 6, pp 635-644, issn 0895-4356, 10 p.Article

Performance of instrumental variable methods in cohort and nested case―control studies: a simulation studyJAMAL UDDIN, Md; GROENWOLD, Rolf H. H; DE BOER, Anthonius et al.Pharmacoepidemiology and drug safety. 2014, Vol 23, Num 2, pp 165-177, issn 1053-8569, 13 p.Article

Attributable mortality of ventilator-associated pneumonia: a meta-analysis of individual patient data from randomised prevention studiesMELSEN, Wilhelmina G; ROVERS, Maroeska M; LACHERADE, Jean-Claude et al.Lancet. Infectious diseases (print). 2013, Vol 13, Num 8, pp 665-671, issn 1473-3099, 7 p.Article

Time-dependent propensity score and collider-stratification bias: an example of beta₂-agonist use and the risk of coronary heart diseaseSANNI ALI, M; GROENWOLD, Rolf H. H; PESTMAN, Wiebe R et al.European journal of epidemiology. 2013, Vol 28, Num 4, pp 291-299, issn 0393-2990, 9 p.Article

Propensity score balance measures in pharmacoepidemiology: a simulation studySANNI ALI, M; GROENWOLD, Rolf H. H; PESTMAN, Wiebe R et al.Pharmacoepidemiology and drug safety. 2014, Vol 23, Num 8, pp 802-811, issn 1053-8569, 10 p.Article

17α-Hydroxyprogesterone Caproate for the Prevention of Adverse Neonatal Outcome in Multiple Pregnancies: A Randomized Controlled TrialLIM, Arianne C; SCHUIT, Ewoud; KARS, Michael M et al.Obstetrics and gynecology (New York. 1953). 2011, Vol 118, Num 3, pp 513-520, issn 0029-7844, 8 p.Article