Regression discontinuity designs: an approach to the evaluation of treatment efficacy in primary care using observational data.

Aidan G O'Keeffe ; Sara Geneletti ; Gianluca Baio ; Linda D Sharples ; Irwin Nazareth ; Irene Petersen ; (2014) Regression discontinuity designs: an approach to the evaluation of treatment efficacy in primary care using observational data. BMJ (Clinical research ed), 349 (sep08 ). g5293-. ISSN 0959-8138 DOI: 10.1136/bmj.g5293