Smoking cessation would prolong life by a mean of 4 years in a 45-year old man and by 3 years in a diabetic man, whereas

aspirin and antihypertensive treatment would provide approximately 1 year of additional life expectancy.123,124 The following cohort studies summarized in the text below and in Table A15 have included assessment of renal outcomes. Smoking has been found to be an independent risk factor for progression of AER selleck inhibitor in people with type 2 diabetes. In a prospective 9-year follow-up study of 108 people with type 2 diabetes and normal AER after a duration of diabetes of 9 years, there was an over-representation of smokers (55% vs 27%; P = 0.01) in people who progressed to micro- or macroalbuminuria versus those who did not progress.125 A number of prospective cohort studies were identified by the search strategy that have considered smoking in people with type 2 diabetes in relation to kidney function. Relevant details of these studies are summarized in Table A15. All of these studies showed an association between smoking and albuminuria. Only one cohort study was found which included an assessment of smoking as a risk factor for eGFR.126 Of the 7 prospective cohort studies identified only

one small study reported no significant association between smoking and the progress of albuminuria.127 Chuahirun & Wesson128 prospectively sought predictors of renal function decline in 33 people with type 2 diabetes, successfully targeting a mean BP goal of 92 mm Hg (about 125/75 mm Hg) with antihypertensives including ACEi. Initial plasma Methane monooxygenase creatinine was <1.4 mg/dL, follow-up 64.0 ± 1.1 months.

Regression RO4929097 order analysis showed that smoking was the only examined parameter that significantly predicted renal function decline. In the 13 smokers, serum Cr increased from 1.05 +/ to 0.08 mg/dL to 1.78 ± 0.20 mg/dL although MAP was the same. The 20 non-smokers had a lesser Cr rise at 1.08 ± 0.03 mg/dL to 1.32 ± 0.04 mg/dL. The 6 month prospective cohort studies concluded that cigarette smoking exacerbates renal injury despite adequate BP control with ACEi.129 Smoking cessation by those with microalbuminuria was associated with amelioration of the progressive renal injury caused by continual smoking. The smaller but long-term study concluded that smoking and increased UAE are interrelated predictors of nephropathy progression and that smoking increases UAE in patients despite improved BP control and ACE inhibition.130 The prospective cohort study included 6513 people with type 2 diabetes with 5 year follow up period.131 Smoking was identified as an independent risk factor for established microalbuminuria and for the development of microalbuminuria. Similarly the retrospective cohort study,126 used logistic to show that smoking was the most important risk factor for progression of nephropathy. The authors concluded that quitting smoking should be part of the prevention therapy.