Table 3: Results table for Social Support
Population	Type of intervention	Return to work/sick leave				Work Productivity
		Effect (+/–)	Level of evidence a	Subgroup		Effect (+/–)	Level of evidence	Subgroup
At work	Simple	0*	Inconclusive (HQc)5** included both at and off work	MSDd specific to neck pain		+	Limited (MQc)16	Variety of occupations
	Complex	–	No effect (HQ)15
		+	Limited (HQ)8	Mental Health
Off workb	Simple	+	Strong (HQ)4 – 7/10 studies	Low back pain (7/9) other two were MSD or variety of reason		+	Moderate (HQ)3	Depression
		+e	Moderate (HQ)14	MSD or chronic pain related condition
		+	Moderate (LQ)17
	Complex		—	—		—	—	—
a Based on authors’ and reviewers’ interpretation of results and recommendations b Based on workers who are on sick leave / disability at baseline c Systematic review quality: high-quality (HQ), moderate-quality (MQ) d MSD: musculoskeletal disorder e Insufficient evidence to support effect beyond one year * Reflects no effect ** “Simple” refers to an intervention with a single component; “Complex” interventions were those with more than a single component