Exact(24)
The study based on patient-level data (Lichtenberg 2013) found that controlling for race, education, family income, insurance coverage, Census region, BMI, smoking, the mean year the person started taking his or her medications, and over 100 medical conditions had virtually no effect on the estimate of the effect of pharmaceutical innovation (the change in drug vintage) on life expectancy.
We calculated the trends in human population at each location between the mean of the year of the pre-1950 time period and the mean year of the post-1950 time period for each site [Table S1].
The mean year of birth for the two generations was 1972 and 2000, respectively.
The mean year of cancer diagnosis was 1993, range 1986–2000.
The mean year of graduation was 1981, with a range of 1967 to 2002.
The mean year of practice was 6.3 ± 3.1 years (median = 6 years, min-max = 1 14 years).
Similar(36)
Annual incidence was calculated by dividing cumulative incidence by the mean years of follow-up.
The mean years since onset of chronic migraine varied between 17.6 and 20.6 years [3, 4].
The mean years of schooling completed was about 7 (that is, up to the vocational or technical certificate level).
The mean years for smoking was 23.9 years (SD =14.3).
The mean years in practice were 24.4 ± 11.1.
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