Table 1: The gender and age specific prevalence of gallstone disease among elderly agricultural and fishing screened subjects (n = 6,511).

VariableGallstone disease
TotalSubtotalSingle stoneMultiple stonesCholecystectomy
ScreenedPrevalencePrevalencePrevalencePrevalence
NumberNumber(%)Number(%)Number(%)Number(%)

Sex
 Male 3,971 484 12.2 206 5.2 1714.3 107 2.7
 Female 2,540 376 14.8 153 6.0 1576.2 66 2.6
P value for χ 2-test0.003
Age
 60–64 2,140 225 10.5 94 4.4 93 4.3 38 1.8
 65–74 2,440 313 12.8 130 5.3 125 5.1 58 2.4
 75–84 1,608 240 14.9 100 6.2 81 5.0 59 3.7
 85+ 323 82 25.4 35 10.8 2911.1 18 5.5
P value for
 Cochran-Armitage
 trend test
<0.0001

Total 6,51186013.2 359 5.5 328 5.0 173 2.7