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. 2001 Feb;69(2):996–1001. doi: 10.1128/IAI.69.2.996-1001.2001

TABLE 1.

Descriptive statistics of study subjects

Area and characteristic Fathers Mothers Offspring
Urban
 No. 24 32 134
 Age (yrs)a 54 ± 9 42 ± 8 12 ± 6
Rural
 No. 32 40 104
 Age (yrs)a 44 ± 8 38 ± 9 11 ± 6
a

Ages are means ± standard deviations.