Residence, sex and cause of death inequalities in mortality in Tehran

This paper, using data from 2004 to 2009 Iran Civil registration Organization. Both descriptive and inferential statistics were employed in this paper. First, to assess time trends in mortality over time, the proportional mortality ratio (PMR) was calculated for each year and also for five-year intervals. Second, Cox proportional hazard models were fitted for deaths of all ages. The model specification accounts for residence, sex and cause of death. Measure of association among characteristic were expressed using hazard ratios (HR) with %95 confidence intervals (CI). Results indicate that risk of death were significant for residence, sex and cause of death. Results indicate that with controlling all factors, risk of death among women were 0.17 lower than men. In the other words, women live longer but, with entering cause of death to the previous model, risk of women death increase 0.3 than the men. With controlling all factors risk of rural were 0.6 lower than urban, it means that rural live longer. But, with entering cause of death to this model the rural directions of risk change. Because of longer life of urban we can conclude that increase in risk rate was due to differences in cause of death.
Key words: mortality, Tehran, hazard ratios