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Table 2 The proportion eating raw freshwater fish in different groups of C. sinensis infection based on different diagnostic standards

From: Improving diagnostic performance of the Kato-Katz method for Clonorchis sinensis infection through multiple samples

No. of smears Positive cases Negative cases False negative cases
N Consuming raw fish Not consuming raw fish Unclear data N Consuming raw fish Not consuming raw fish Unclear data N Consuming raw fish Not consuming raw fish Unclear data
n (%)a n n n (%)a n n n (%)a n n
1 stool × 1 smear 45 32 (72.7)b 12 1 352 101 (28.9)c 249 2 32 21 (67.7)d 10 1
1 stool × 2 smears 49 35 (72.9)e 13 1 348 98 (28.3)f 248 2 28 18 (66.7)g 9 1
1 stool × 3 smears 55 39 (73.6)h 14 2 342 94 (27.6)i 247 1 22 14 (63.6)j 8 0
2 stools × 1 smear 64 43 (68.3)k 20 1 333 90 (27.2)l 241 2 13 10 (83.3)m 2 1
2 stools × 2 smears 73 50 (69.4)n 22 1 324 83 (25.8)o 239 2 4 3 (100.0)p 0 1
2 stools × 3 smears 77 53 (70.7)q 22 2 320 80 (25.1) 239 1 0 0 0 0
  1. aNo. with unclear data was not included in the calculation of the proportion
  2. bχ2 = 33.64, df = 1, P < 0.001, positive cases vs negative cases
  3. cχ2 = 19.78, df = 1, P < 0.001, negative cases vs false negative cases
  4. dχ2 = 0.22, df = 1, P = 0.641, positive cases vs false negative cases
  5. eχ2 = 37.49, df = 1, P < 0.001, positive cases vs negative cases
  6. fχ2 = 17.18, df = 1, P < 0.001, negative cases vs false negative cases
  7. gχ2 = 0.33, df = 1, P = 0.568, positive cases vs false negative cases
  8. hχ2 = 43.44, df = 1, P < 0.001, positive cases vs negative cases
  9. iχ2 = 12.87, df = 1, P < 0.001, negative cases vs false negative cases
  10. jχ2 = 0.74, df = 1, P = 0.389, positive cases vs false negative cases
  11. kχ2 = 39.91, df = 1, P < 0.001, positive cases vs negative cases
  12. lFisher’s exact test, P < 0.001, negative cases vs false negative cases
  13. mFisher’s exact test, P = 0.491, positive cases vs false negative cases
  14. nχ2 = 50.18, df = 1, P < 0.001, positive cases vs negative cases
  15. oFisher’s exact test, P = 0.018, negative cases vs false negative cases
  16. pFisher’s exact test, P = 0.551, positive cases vs false negative cases
  17. qχ2 = 56.44, df = 1, P < 0.001, positive cases vs negative cases
  18. Abbreviation: N, total number of cases