Perhaps past smoking patterns are the important detail for some of smoking’s effects while more recent smoking determines the others. I wouldn’t be surprised to find that the US in the 50′s had (relatively) high smoking rates. Also the differences in female versus male smoking rates and disease susceptibility could be significant.
Re: parenthetical statement
Perhaps past smoking patterns are the important detail for some of smoking’s effects while more recent smoking determines the others. I wouldn’t be surprised to find that the US in the 50′s had (relatively) high smoking rates. Also the differences in female versus male smoking rates and disease susceptibility could be significant.