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. 2022 Jan 2;22:9. doi: 10.1186/s12913-021-07314-2

Table 10.

Estimate from segmented linear regression for adverse events in Site 3

Outcome Estimate, ß
(95% CI)
P Value Interpretation
Adverse events
 Intercept 3.27 (2.12, 4.42)
 Pre-intervention trend 0.04 (−0.06, 0.15) 0.42 There is a trend towards increasing event rates although this is not significant.
 Change in slope (implementation period vs. pre-intervention period) 0.01 (−0.16, 0.18) 0.92 The event rate doesn’t change but given the wide confidence intervals it is difficult to be precise about whether this is a true effect.
 Immediate change in level (implementation period vs. pre-intervention period) 0.21 (−1.55, 1.97) 0.81
 Change in slope (post-intervention period vs implementation period) −0.27 (− 0.47, − 0.07) 0.01 The trend significantly reduced over this period (although the overall number of events per patients day increases)
 Immediate change in level (post-intervention period vs. implementation period) 1.98 (−0.22, 4.18) 0.09