Effectiveness of a clinical practice change intervention in increasing the provision of nicotine dependence treatment in inpatient psychiatric facilities: an implementation trial

Table 3 Results of segmented logistic regression showing differences in odds of reporting of the key nicotine dependence treatment items within, and between the pre- (n = 1054), during (n = 2043) and post-intervention (n = 1078) periods

	Slope AOR^a within period^b (99% CI)			Difference in slope AOR^a between periods^c (99% CI)
Outcome	Pre intervention (n = 1054)	Intervention period (n = 2043)	Post intervention (n = 1078)	Pre- intervention vs. intervention	Intervention vs. Post-intervention	Pre-intervention- vs. Post-intervention	End of pre-intervention vs. end of post-intervention^d
Smoking status assessed	0.99 (0.93, 1.05)	1.02 (0.97, 1.07)	1.02 (0.82, 1.21)	1.03 (1.01, 1.05)^**	0.98 (0.81, 1.18)	1.01 (0.79, 1.29)	2.39 (1.23 to 4.66)^**
Nicotine dependence assessed	1.06 (0.93, 1.20)	1.23 (1.11, 1.37)^**	2.22 (1.63, 3.03)^**	1.16 (1.10, 1.24)^**	1.80 (1.33, 2.43)^**	2.10 (1.42, 3.09)^**	109.67 (35.35, 340.22)^**
Provided brief advice to quit	1.07 (0.80, 1.42)	1.23 (1.11, 1.37)^**	2.22 (1.63, 3.03)^**	1.23 (1.15, 1.32)^**	1.73 (1.23, 2.40)^**	2.11 (1.37, 3.24)^**	97.43 (31.03, 306.30)^**
Prescribed NRT	1.05 (0.95, 1.16)	1.10 (1.02, 1.19)^**	1.32 (1.05, 1.66)^**	1.05 (1.01, 1.08)^**	1.19 (0.96, 1.49)	1.25 (0.94, 1.66)	19.59 (8.17, 46.94)^**
Treatment for smoking on discharge	0.97 (0.90, 1.04)	0.98 (0.92, 1.03)	1.79 (1.46, 2.20)^**	1.01 (0.98, 1.04)	1.84 (1.51, 2.24)^**	1.85 (1.43, 2.40)^**	12.36 (6.08, 25.14)^**

^**Indicates significant at p < .01
AOR Adjusted odds ratio, CI Confidence interval, NRT Nicotine replacement therapy
^aOdds ratios were adjusted for potential confounders. Unadjusted odds ratios are presented in the Additional file 1. Adjustment for cofounders did not affect results
^bRepresents the change in recording of treatment within each period (accounting for all months in each period)
^cRepresents the change in recording of treatment between each period (accounting for all months in each period)
^dRepresents the change in recording of treatment from the last data point of the pre-intervention period to the last data point of the post-intervention period

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