Relationship of cardiometabolic parameters in non-smokers, current smokers, and quitters in diabetes: a systematic review and meta-analysis

Table 2 Study characteristics of smokers and quitters

Study	Country	No of participants	Exposure/control		Age/sex		Included or excluded from meta-analysis Study design
Study	Country	No of participants	Smoker	Quitter	Smoker	Quitter	Included or excluded from meta-analysis Study design
Lycett et al. [51] T2DM	UK	10,692	7561	3131	61.6 (12.1) 58.4% M	61.6 (11.3) 64.4% M	Included Retrospective cohort study
Iino et al. [52] T2DM	Japan	31	16	15	60.1 (2.5) 81.25% M	62.7 (2.5) 80% M	Excluded (subjects started smoking within 12 months) Prospective cohort study
Reynolds et al. [42] T2DM	USA	125	66	59	18.6 (2.5) 39.4%	17.9 (2.4) 47.5% M	Included Cross sectional study
Reynolds et al. [42] T1DM	USA	412	203	209	18.3 (2.2) 50.7% M	17.7 (2.7) 47.4% M	Included Cross sectional study
Ohkuma et al. [50] T2DM	Japan	2490	679	1306	61.2 (10)	66.9 (9.2)	Included Cross sectional study

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