Table 3

 Characteristics of cholera cases compared with individuals who did not visit an outpost for diarrhoea during the surveillance period in a study site in Kolkata, India, 1 May 2003 to 30 April 2004

No. (%) with the following characteristicsCholera casesIndividuals with no visit for diarrhoeaCrude ORAdjusted* OR
(n = 126)(n = 59520)(95% CI), p value(95% CI), p value
*Adjusted for age and correlation within household.
†Adjusted for age only.
With other household member with cholera
    None114 (90)58799 (99)RefRef
    One or more12 (10)721 (1)8.6 (4.7 to 15.6), <0.018.1 (4.4 to 14.8), <0.01†
Age
    ⩾60 months80 (63)54772 (92)RefRef
    <60 months46 (37)4748 (8)6.6 (4.6 to 9.5), <0.016.6 (4.6 to 9.6), <0.01
Literacy of adults ⩾15 years old
    Literate20 (42)27751 (65)RefRef
    Illiterate28 (58)15265 (35)2.5 (1.4 to 4.5), 0.0012.5 (1.4 to 4.5), 0.002
Monthly household expenditure
    >44 US$ (2000 INR)82 (65)42746 (73)RefRef
    ⩽44 US$ (2000 INR)44 (35)16016 (27)1.4 (1.0 to 2.1), 0.061.4 (1.0 to 2.1), 0.06
Household members wash hands after defecation
    Always79 (63)40359 (68)RefRef
    Sometimes or never47 (37)19123 (32)1.3 (0.9 to 1.8), 0.21.2 (0.8 to 1.7), 0.4
Type of house
    Brick110 (89)51937 (88)RefRef
    Semi-brick/mud14 (11)7238 (12)0.9 (0.5 to 1.6), 0.70.9 (0.5 to 1.6), 0.7
Drinking water source
    Bottled or tap124 (98)58317 (98)RefRef
    Well, pump, or vendor2 (2)1194 (2)0.8 (0.2 to 3.2), 0.70.8 (0.2 to 3.6), 0.8