Table 1

Intraobserver agreementa for the classification of histology among subjects in the NYC colonoscopy-based case-control study (1988, 1998)

1988 ratings1998 Histology ClassificationTotal
TubularTubulovillousVillous
Tubular559064
Tubulovillous52543109
Villous210113
Total109734186b
  • a κ = 0.28; 95% CI, 0.17–0.39. Weighted κ = 0.32; 95% CI, 0.22–0.42.

  • b The totals do not equal the number of cases reviewed because of missing information.