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Table 4 Number of available comparisons for the statistical methods investigated (n = 190)

From: Comparison of six statistical methods for interrupted time series studies: empirical evaluation of 190 published series

Number of comparisons ARIMA OLS NW PW REML REML-Satt
ARIMA 189 189 188 185 175 175
OLS   190 189 186 175 175
NW    189 186 174 174
PW     186 171 171
REML      175 175
REML-Satt       175
  1. Abbreviations: ARIMA Autoregressive integrated moving average, OLS Ordinary least squares, NW OLS with Newey-West standard error adjustments, PW Prais-Winsten, REML Restricted maximum likelihood, REML-Satt Restricted maximum likelihood with Satterthwaite small sample adjustment