TY - JOUR T1 - Clarifying the interrupted time series study design: the author’s reply JF - BMJ Quality & Safety JO - BMJ Qual Saf SP - 475 LP - 476 DO - 10.1136/bmjqs-2015-004163 VL - 24 IS - 7 AU - Peter McCulloch Y1 - 2015/07/01 UR - http://qualitysafety.bmj.com/content/24/7/475.2.abstract N2 - Technically, the term interrupted time series (ITS) includes before–after studies. However, we completely agree with Svoronos and Fretheim that the utility of the term ITS will not be retained unless it is reserved for … ER -