Number needed to treat by Ranstam, J, Cook, JA

Reply by Lois, N, Cook, JA

Response to Letter from Wong on determining the target difference in sample size calculations for randomised controlled trials by Cook, JA, Parker, RA

Risk of bias by Ranstam, J, Cook, JA

Letter to the editor regarding "Incomparability of treatment groups is often blindly ignored in randomised controlled trials – a post hoc analysis of baseline characteristic tables... by Knight, R, Cook, JA

Immortal time bias by Ranstam, J, Cook, JA

Quantiles by Ranstam, J, Cook, JA

Non-inferiority and equivalence trials by Ranstam, J, Cook, JA

The importance of clinical importance when determining the target difference in sample size calculations by Parker, RA, Cook, JA

Editorial commentary: Evidence for patch augmentation of rotator cuff repair is weak by Cook, JA, Baldwin, M, Carr, AJ

Propensity scores by Turkiewicz, A, Cook, JA, Ranstam, J

The art of reporting numerical data by Cook, JA, Bi, D, Ranstam, J

Patient-reported outcomes and target effect sizes in pragmatic randomized trials in ClinicalTrials.gov: a cross-sectional analysis by Vanderhout, S, Fergusson, DA, Cook, JA, Taljaard, M

Investigating the impact of clustering by surgeon on trial conclusions: to adjust or not to adjust by Conroy, EJ, Blazeby, JM, Burnside, G, Cook, JA, Gamble, C

Current practice in analysing and reporting binary outcome data—a review of randomised controlled trial reports by Rombach, I, Knight, R, Peckham, N, Stokes, JR, Cook, JA

Managing clustering effects and learning effects in the design and analysis of randomised surgical trials: a review of existing guidance by Conroy, EJ, Blazeby, JM, Burnside, G, Cook, JA, Gamble, C

Conditional versus non-conditional incentives to maximise return of participant completed questionnaires in clinical trials: a cluster randomised study within a trial by Cook, J, Cook, JA, Bongard, E, Heneghan, C, Butler, CC

A simulation study to compare longitudinal methods for the analysis of randomised trials and the implications for sample size calculation by Copsey, B, Dutton, SJ, Fitzpatrick, R, Lamb, SE, Cook, JA

Arthroplasties for hip fracture in adults by Lewis, SR, Macey, R, Parker, MJ, Cook, JA, Griffin, XL

Investigating the presence of surgical learning in the timing of primary surgery for cleft palate (TOPS) randomised trial by Conroy, EJ, Blazeby, JM, Burnside, G, Cook, JA, Gamble, C