Perseverative cognition and health behaviours: exploring the role of intentions and perceived behavioural control

Figures & data

Table 2. Mediation analysis for worry, intentions & PBC, and sleep behaviours.

Predictor (T1)	Mediator (T1)	Outcome(s) (T2)	Effect	b (95% CI)	S. E	R^2
Worry	Intentions	Sleep Quality	Total	−.059***	.009
			Direct	−.058***	.009
			Indirect	−.002 (-.006 − .003)	1.70	.001
Worry	Intentions	Total Sleep Time	Total	−.009	.007
			Direct	−.007	.007
			Indirect	−.002 (-.007 − .004)	.0003	.001
Worry	Intentions	Sleep Onset Latency	Total	.559	.419
			Direct	.543	.418
			Indirect	.016 (-.037 − .070)	.027	.006
Worry	PBC	Sleep Quality	Total	−.059***	.009
			Direct	−.045***	.008
			Indirect	−.014 (-.023 – −.005)**	.005	.285
Worry	PBC	Total Sleep Time	Total	.007	.007
			Direct	.003	.006
			Indirect	−.013 (-.021 – −.005)***	.004	.280
Worry	PBC	Sleep Onset Latency	Total	.559	.419
			Direct	.411	.420
			Indirect	.148 (.007 − .290)^†	.072	.018

Note: *p < .0125, **p < .01 ***p < .001; †p = .05; CI’s are at 95% level; b = regression coefficient; R² = coefficient of determination; S.E = Standard Error, T1 = Timepoint 1, T2 = Timepoint 2; SQ = Sleep Quality, TST = Total Sleep Time.

Table 1. Relationships between worry and rumination and study variables.

	M	SD	1	2	3	4	5	6	7	8	9	10
1. Worry (T1)	18.09	6.42	–
2. Rumination (T1)	10.33	2.87	0.55***	–
3. PA Intention (T1)	5.62	1.77	−0.06	−0.02	–
4. Sleep Intention (T1)	5.22	1.55	−0.03	−0.04	0.07	–
5. SA Intention (T1)	5.51	1.56	0.05	0.03	0.01	−.04	–
6.US Intention (T1)	4.72	1.77	0.01	0.11**	0.23***	0.12**	−0.10	–
7. PA PBC (T1)	5.59	1.41	−0.07	−0.06	0.804***	0.13***	0.03	0.17***	–
8. Sleep PBC (T1)	4.01	1.77	−0.13**	−0.11**	0.01	0.62***	−0.06	0.09	0.12**	–
9. SA PBC (T1)	5.58	1.22	−0.04	−0.06	0.02	0.04	0.60***	−0.07	0.11**	0.10*	–
10. US PBC (T1)	4.77	1.22	−0.10	−0.01	0.16***	0.14***	−0.07	0.55***	0.20***	0.23***	0.07	–
11. TST (T2)	6.65	1.16	0.06	0.08	0.08	0.38***	0.02	0.03	0.13***	0.53***	0.10*	0.11**
12. SOL (T2)	37.41	65.35	−0.05	−0.10	−0.04	−.06	0.06	0.04	−0.07	−0.12**	0.05	0.05
13. Sleep Qual (T2)	4.43	1.48	−0.26***	−0.22***	0.13**	0.26***	−0.01	0.08	0.20***	0.50***	0.12**	0.20***
14. PA (Freq) (T2)	2.92	1.56	−0.02	0.05	0.37***	0.031	−0.10*	0.12**	0.34***	0.04	−0.05	0.12***
15. PA (Dur) (T2)	35.65	35.89	−0.03	−0.01	0.24***	0.05	0.04	0.01	0.18***	0.01	0.02	0.02
16. Sedentary A (T2)	41.45	31.61	−0.05	−0.01	-.0.08	0.03	0.11**	−0.01	−0.09	0.05	0.05	−0.04
17. Unhealthy S (T2)	32.38	10.59	0.04	0.03	−0.01	0.02	0.01	−0.07	−0.01	−0.02	0.01	−0.16***

Note: *p < .0125, **p < .01 ***p < .001; T1 = Timepoint 1, T2 = Timepoint 2; PA = Physical Activity, SA = Sedentary Activity, US = Unhealthy Snacking, PBC = Perceived Behavioural Control, TST = Total Sleep Time, SOL = Sleep Onset Latency, Sleep Qual = Sleep Quality; Measurements: Total Sleep Time = hours; Sleep Onset Latency = minutes; Physical Activity Duration = minutes.

Table 3. Mediation analysis for rumination, intentions & PBC, and sleep behaviours.

Predictor (T1)	Mediator (T1)	Outcome(s) (T2)	Effect	b (95% CI)	S. E	R^2
Rumination	Intentions	Sleep Quality	Total	−.111***	.021
			Direct	−.105***	.020
			Indirect	−.006 (-.016 − .005)	.005	.002
Rumination	Intentions	Total Sleep Time	Total	−.042*	.017
			Direct	−.035^†	.015
			Indirect	−.007 (-.019 − .006)	.006	.002
Rumination	Intentions	Sleep Onset Latency	Total	1.79^†	.935
			Direct	1.72	.934
			Indirect	.056 (-.075 − .188)	.067	.009
Rumination	PBC	Sleep Quality	Total	−.111***	.021
			Direct	−.083***	.018
			Indirect	−.028 (-.048 – −.008)**	.010	.273
Rumination	PBC	Total Sleep Time	Total	−.042*	.017
			Direct	−.017	.014
			Indirect	−.024 (-.041 − .007)**	.009	.281
Rumination	PBC	Sleep Onset Latency	Total	1.794^†	.935
			Direct	1.515	.935
			Indirect	.279 (-.008 − .565)^†	.146	.018

Note: *p < .0125, **p < .01 ***p < .001; †p = .05; CI’s are at 95% level; b = regression coefficient; R² = coefficient of determination; S.E = Standard Error, T1 = Timepoint 1, T2 = Timepoint 2; SQ = Sleep Quality, TST = Total Sleep Time.