Table 1

Demographic features of patients and contacts enrolled in this study

FeatureValue for groupb
PatientsInfected contactsUninfected contacts
Age (yrs), mean ± SDa24.9 ± 14.521.9 ± 14.626.5 ± 14.3
No. (%) female40 (43.5)40 (58.0)52 (45.2)
No. (%) with blood group
    O40 (43.5)31 (44.9)50 (43.5)
    Non-O52 (56.5)38 (55.1)65 (56.5)
No. (%) with V. cholerae serotype
    Inaba17 (18.5)7 (10.1)18 (15.7)
    Ogawa75 (8l.5)62 (89.9)97 (84.3)
  • a A significant difference between infected and uninfected contacts was observed for age (P = 0.027, Mann-Whitney U test). No significant difference in gender or blood group was observed between contacts. No significant differences were observed between patients and either group of contacts in age, gender, or blood group.

  • b For patients, n = 92; for infected contacts, n = 69; for uninfected contacts, n = 115.