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Table 2 Reproducibility of stool status assessed by self-reported questionnaire

From: Stool pattern is associated with not only the prevalence of tumorigenic bacteria isolated from fecal matter but also plasma and fecal fatty acids in healthy Japanese adults

  Agreement Adjacent agreement Disagreement Weighted κ statistic 95% CI
n (%) n (%) n (%)
Stool volume 120 (53.6) 46 (20.5) 17 (7.6) 0.96 (0.93 to 0.99)
Stool color 133 (59.4) 67 (29.9) 7 (3.1) 0.95 (0.92 to 0.98)
Stool shape 161 (71.9) 43 (19.2) 4 (1.8) 0.97 (0.95 to 0.99)
Stool odor 159 (71.0) 62 (27.7) 3 (1.3) 0.92 (0.86 to 0.98)
  1. All values are shown as numbers of people and percentages and weighted κ statistics with 95% confidence interval (CI). The stool status was evaluated by each category as follows: stool volume [1 point (smaller) to 8 points (larger)], stool color [1 point (yellow) to 6 points (dark)], stool shape [1 (severe constipation; separate hard lumps) to 7 (severe diarrhea; liquid consistency with no solid pieces)], and stool odor [1 (no smell) to 4 (severe smell)]. Disagreement was defined as a difference of more than three categories between each variable. The weighted κ statistic can range from 0.00 (perfect disagreement) to 1.00 (perfect agreement)