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Fig. 7 | BMC Medical Research Methodology

Fig. 7

From: Evaluation of statistical methods used in the analysis of interrupted time series studies: a simulation study

Fig. 7

Coverage for the level change parameter. Each point is the proportion of the 10,000 simulations in which the 95% confidence interval included the true value of the parameter. The solid black line depicts the nominal 95% coverage level. The simulation combination presented is for a level change of 2 and slope change of 0.1; however, other combinations give similar results. Abbreviations: ARIMA, autoregressive integrated moving average; OLS, ordinary least squares; NW, Newey-West; PW, Prais-Winsten; REML, restricted maximum likelihood; Satt, Satterthwaite

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BMC Medical Research Methodology

ISSN: 1471-2288

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