Applying behavioural science to increase uptake of the NHS Health Check: a randomised controlled trial of gain- and loss-framed messaging in the national patient information leaflet

Table 4 Fixed effects coefficients of mixed effects logistic regression including previous NHS Health Check attendance and 2-way interactions with leaflet type (age as a standardized variable)

	Coef.	Std. error	t	Sig.	95% confidence interval
	Coef.	Std. error	t	Sig.	Lower	Upper
Intercept	−0.81	.12	−6.50	<.001	−1.05	−.57
Gain-framed leaflet	0.12	.13	0.90	.37	−0.14	0.38
Loss-framed leaflet	0.15	.13	1.16	.25	−.11	.42
NE Lincolnshire	−.46	.19	−2.39	.017	−.84	−.08
Male	−.32	.09	−3.50	<.001	−.50	−.140
Age	−.003	.05	−.06	.96	−.11	.10
Previous NHS HC not completed	−.76	.11	−7.29	<.001	−.97	−.56
Gain-framed * NE Lincolnshire	−.17	.18	−.97	.33	−.52	.18
Loss-framed leaflet * NE Lincolnshire	−.07	.18	−.39	.70	−0.42	.28
Gain-framed leaflet * Male	−.001	.13	−.01	.99	−.25	.25
Loss-framed leaflet * Male	−.00	.13	−.002	.998	−.25	.25
Gain-framed leaflet * Age	.071	.072	.99	.32	−.07	.21
Loss-framed leaflet * Age	.005	.07	.63	.53	−.10	.19
Gain-framed leaflet * Previous HC not completed	−.05	.15	−.34	.73	−.33	.23
Loss-framed leaflet * Previous HC not completed	−.22	.15	−1.49	.14	−.50	.07

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