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Table 2 Period, number of years and months, and total number of EBPs described in each review

From: Evaluation parameters for evidence-based practices for people with autism spectrum disorder: a narrative review of group and single-subject design studies

Document Period included in review No. of years and months Total number of years and monthsa Total no. of EBPs
NAC (2009) Jan 1957 to Sep 2009 51 y, 9 m 51 y, 9 m 11
NPDC (Odom et al., 2010) Jan 1997 to Dec 2007 10 y 10 y 24
NPDC (Wong et al., 2014) Jan 1990 to Dec 2011 11 y 21 y 27
NAC (2015) Sep 2009 to Feb 2012 2 y, 5 m 54 y, 2 m 14
NCAEP (Steinbrenner et al., 2020) Jan 2012 to Dec 2017 5 y 26 y 28
  1. a Sum of the time range covered in initial plus further reviews by each clearinghouse