were males, 68.8% and 57.4% in S1 and S2, respectively. More than half
of the participants (66) in S1 were over 50 years of age, and 46 were
40–50 years old, together comprising 86.8% of the interviewees. These
two age classes, however, were evenly distributed near 25.0% in S2,
with a standard deviation of 6.3% in each age class.