Table 2. Difference in mean number of cigarettes in an average week between current smokers with and without job strain.

Job strain status (n = 25 561)	Mean (SD) number of cigarettes	Difference in means (95% CI)
		Random effects meta-analysis	Fixed effect meta-analysis
No job strain (n = 20 652)	99.9 (60.7)	1 (reference category)	1 (reference category)
Job strain (n = 4 909)	103.3 (61.2)	2.96 (0.87, 5.04)	2.72 (1.04, 4.41)
		I2 = 19.4%, p = 0.270

NB: Analyses include participants who were current smokers at baseline, for whom we had access to individual-level data and who had smoking intensity data available and were adjusted for age, sex and socioeconomic position.