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Table 1 Study period with randomisation steps

From: A programme to spread eGFR graph surveillance for the early identification, support and treatment of people with progressive chronic kidney disease (ASSIST-CKD): protocol for the stepped wedge implementation and evaluation of an intervention to reduce late presentation for renal replacement therapy

Centres Historical control-periods Periods of core-study
(4 × 6 months) Jan-Jun Jul-Dec Jan-Jun Jul-Dec Jan-Jun Jul-Dec
Jan-2013 - Dec 2014 2015 2015 2016 2016 2017 2017
A – D 0 0 0 0 0 1 1 1 1 1
E – I 0 0 0 0 0 0 1 1 1 1
J – N 0 0 0 0 0 0 0 1 1 1
O – R 0 0 0 0 0 0 0 0 1 1
  1. 0=’control’; 1=’intervention’ - eGFR graph surveilence