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. 2011 Dec 9;9:164. doi: 10.1186/1477-7819-9-164

Table 1.

showing comparison of basic demographic, clinical and ultrasonographic details of two population

Variable Cases n = 60
(%)
Controls n = 120
(%)
P-value
Gender
 Male 20(33.33) 26(21.6) 0.104
 Female 40(66.66) 94(78.1)

Age more than 55 years 42(68) 29(24) 0.0001

BMI more than 23 Kg/m2 46(77) 94(78) 0.78

Parity of more than 5 41(69) 51(43) 0.005

History of Hypertension 16(26) 28(23.3) 0.826

History of Diabetes 13(21.6) 17(14.1) 0.726

History of typhoid nil 1 0.000*

Oral contraceptive pills use nil 18)15) 0.000*

History of smoking 8(13.3) 4(3) 0.123

History of alcohol 2(3) 9(7) 0.000*

Stone characteristics
 Solitary stones 22(37) 18(15) 0.005
 Size more than 1 cm 36(59) 41(35) 0.015
 Mean stone size in cm 1.9 0.6
 Median of stone size in cm 2.1 0.8

P-value calculated using chi-square test.* Unreliable significance values as this value is confounded by significant missing/small data.