Table 2.

Subgroup analysis of relative risk of high job strain with T2DM risk. [T2DM=type 2 diabetes mellitus; BMI=body mass index; RR=relative risk; CI=confidence interval.]

	Reports (N)	RR	95% CI	I2 (%)	P a
	Gender b
Men	5	1.02	0.76–1.36	43.5	0.132
Women	4	1.48	1.02–2.14	61.3	0.057
Study location
Europe	5	1.16	1.01–1.33	46.9	0.110
Asia	1	1.34	0.50–3.57
T2DM ascertainment
Objectively defined	6	1.16	1.03–1.31	34.4	0.179
Self-reported	0
Controlling smoking in models
Yes	1	1.14	0.94–2.20
No	5	1.14	1.00–1.30	39.3	0.159
Controlling drinking in models
Yes	1	1.14	0.94–2.20
No	5	1.14	1.00–1.30	39.3	0.159
Controlling physical activity in models
Yes	1	1.14	0.94–2.20
No	5	1.14	1.00–1.30	39.3	0.159
Controlling BMI in models
Yes	1	1.14	0.94–2.20
No	5	1.14	1.00–1.30	39.3	0.159
Controlling family history of DM in models
Yes	1	1.14	0.94–2.20
No	5	1.14	1.00–1.30	39.3	0.159
Controlling education in models
Yes	1	1.14	0.94–2.20
No	5	1.14	1.00–1.30	39.3	0.159

^aP-value for homogeneity.

^bPan et al (2017) stratified by gender and age (60 years old population and population aged ≥ 66 years old) were treated as for four separate reports.