Impaired sleep, depressive symptoms, and pain as determinants of physical activity and exercise intervention adherence: an exploratory analysis of a randomized clinical trial

Table 3 Intervention effect on PA after 2 years, stratified by baseline sleep duration and quality, depressive symptoms, and pain

		Likelihood of being physically active after 2 years in the intervention compared with control group		Difference between sleep, depressive symptoms or pain groups
	N	OR	95% CI	p-value, interaction with randomization group
Sleep duration < 6 h	50	5.46	0.79–37.55	0.711
Sleep duration ≥ 6–<7 h	169	1.68	0.77–3.66	0.779
Sleep duration ≤ 7–<8 h (ref)	379	2.15	1.24–3.75	REF
Sleep duration ≥ 8–<9 h	376	2.05	1.16–3.63	0.738
Sleep duration ≥ 9 h	96	1.00	0.31–3.27	0.322
Better sleep quality (index < 40)	874	1.89	1.33–2.70	0.921
Worse sleep quality (index ≥ 40)	205	1.95	0.98–3.88	0.921
No depressive symptoms (Zung score < 40)	842	1.74	1.21–2.49	0.302
At least mild depressive symptoms (Zung score ≥ 40)	217	2.75	1.32–5.69	0.302
No or mild bodily pain (RAND-36 Bodily pain < 40)	794	1.70	1.18–2.46	0.421
Pronounced bodily pain (RAND-36 Bodily pain ≥ 40)	280	2.62	1.35–5.08	0.421

ORs (95% CI) are presented from logistic regression models with physical activity after 2 years as the outcome, and adjusted for randomization group, baseline physical activity, age, sex, years of education, BMI, marital status and self-reported current health status at baseline. Models are stratified by baseline sleep duration, sleep quality, depressive symptoms, or pain. Values in bold indicate p < 0.05 for ORs within each sleep, depressive symptoms, or pain group. P-values for interactions of sleep, depressive symptoms, or pain groups and randomization group indicated no statistically significant differences in intervention effect on PA across these groups

ISSN: 1471-2318