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Table 2 Interrupted time series study design—15-month observation period

From: Using segmented regression analysis of interrupted time series data to assess colonoscopy quality outcomes of a web-enhanced implementation toolkit to support evidence-based practices for bowel preparation: a study protocol

Segments

Baseline

Comparative-effectiveness

Replication

Group 1

O1

…

O10

X1

O11

…

O20

X1X2

O21

…

O30

Group 2

O1

…

O10

X1X2

O11

…

…

…

…

…

O30

  1. Note: Each observation represents a 2-week interval. X1 = physician education, X2 = physician education plus staff training and support