Abstract
To quantify the association between tobacco consumption, tobacco expenditures and morbi-mortality attributed to tobacco, and income level. Specifically, to compare high-income versus lower income groups in terms of smoking prevalence, quantity of tobacco consumption, disease incidence and mortality attributed to AIM assessment of IL. We searched in the main literature databases, conferences index, tobacco control agencies, and contacted experts. Two independent researchers by register screened titles and abstracts (agreement >0.9). The full text of selected studies and its risk of bias (using a STROBE-based checklist) were assessed by two researches. One reviewer extracted data, and a second one checked it. Disagreements were solved by consensus. We conducted a random effects meta-analysis based on adjusted OR using Stata 9.0. We performed pre-planned subgroup and sensitivity analysis to evaluate heterogeneity (I2>50%) by calendar decade, continent, WHO region, country standardized mortality rate, risk of bias, gender, and age.
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