Table 3 describes analyses to determine whether the effects documented above differ by period (i.e., year of death) or birth year. For each of these analyses, the sample was split roughly into halves. The first analysis split death-events into those occurring between 1990 and 1996 and those occurring from 1997 to 2004. During the 1990–96 period, the study sample was between the ages of 18 and 47; during 1997 to 2004 the age range was 25 to 55 years old. For both suicide and homicide, the odds ratio associated with lower MLDA exposure was significant for women during both periods, although there was a slight trend toward lower odds ratios for women during the second period – this was more apparent for homicide than for suicide.
