Table 1

Demographic features of cases and controls

CharacteristicsNo. of cases (%)No. of controls (%)
Subjects included in the study72324
Subjects used for matched analysisa49/72 (68)211/324 (65)
H. pylori positive by four methods combinedb57/72 (79)213/324 (66)
H. pylori positive by culture29/72 (40)126/324 (39)
H. pylori positive by immunohistochemistry30/72 (42)126/323 (39)
H. pylori positive by ELISA43/65 (66)136/310 (44)
H. pylori positive by immunoblotting51/66 (77)203/308 (66)
Female20/72 (28)114/324 (35)
Mean (SE) age (yrs)72.7 (12)70.9 (12)
Subjects included from Kalmar Hospitalc29/72 (40)222/324 (68)
Questionnaire response rate40/72 (56)213/324 (66)
  • a Cases matched by at least one control.

  • b Culture, immunohistochemistry, ELISA, and immunoblotting.

  • c The highest number of subjects included were from this hospital.