The age ranged from 20 to 79 years with an
average of 37.7 (S.D. = 12.5) which indicates a slight under-sampling
of the elderly in comparison to the population’s mean
age (40.1 years, NIS, 2007). The average family size of the sample
(3.0, S.D. = 1.5) was fairly higher in comparison with the
population (2.3 persons per family, NIS, 2007).