Table 1.

Number of Citations, Effect Size, Journal Impact Factor, and Scientific Quality for Cohort Studies on Job Strain and Coronary Heart Disease Published From 1989 to 2004

First Author, Year (Reference No.)	No. of Citationsa		Relative Risk	95% CI	Journal Impact Factorb	Quality Scorec
	Scopus	Web-of-Science
Kivimäki, 2002 (11)	384	328	2.20	1.16, 4.17	17.215	4
Johnson, 1989 (8)	255	252	1.94	1.15, 3.21	3.775	6
Kuper, 2003 (12)	219	203	1.57	1.26, 1.96	3.393
Eaker, 1992 (13)	200	189	0.94	0.45, 1.44	4.780	8
Reed, 1989 (7)	125	147	0.94	0.65, 1.36	4.780	6
Alterman, 1994 (9)	120	116	1.48	0.98, 2.24	4.780	8
Lee, 2002 (10)	79	70	0.80	0.48, 1.33	6.982	8

Abbreviation: CI, confidence interval.

^a Citations as of January 25, 2014.

^b Web of Science journal impact factor for 2013.

^c Quality score (range, 0–12) was obtained from a previous review (14). The quality score for Kuper et al. (12) is missing because it was not included in that review.