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Table 2 Inter-rater agreement with respect to parenchymal findings for each coding system (n = 258)

From: Inter-rater agreement in the assessment of abnormal chest X-ray findings for tuberculosis between two Asian countries

Item Coding system Inter-rater agreement
   Kappa with 95% confidence interval
   JP-JP JP-VN     VN-VN
    [1] [2] [3] [4]  
Total number JVCS (245) (246) (245) (245) (244) (255)
of tested films CRRS (245) (245) (246) (246) (245) (255)
Cavity JVCS 0.44 [0.32-0.56] 0.36 [0.25-0.47] 0.47 [0.34-0.64] 0.30 [0.20-0.40] 0.50 [0.38-0.62] 0.52 [0.40-0.64]
  CRRS primary * 0.60 [0.48-0.72] 0.10 [0.03-0.17] 0.28 [0.18-0.38] 0.06 [-0.02-0.14] 0.36 [0.25-0.47] 0.15 [0.04-0.26]
  CRRS secondary -0.02 [-0.14-0.10] 0.04 [0.00-0.08] 0.06 [0.01-0.11] 0.00 [-0.05-0.05] 0.04 [-0.03-0.11] 0.43 [0.32-0.54]
Fibrosis/scar JVCS 0.30 [0.17-0.43] 0.19 [0.07-0.31] 0.34 [0.22-0.46] 0.18 [0.05-0.31] 0.34 [0.23-0.45] 0.31 [0.20-0.42]
  CRRS primary 0.31 [0.18-0.44] 0.02 [-0.02-0.06] 0.27 [0.14-0.40] -0.02 [-0.07-0.03] 0.15 [0.02-0.28] 0.03 [-0.01-0.07]
  CRRS secondary 0.28 [0.16-0.40] 0.20 [0.10-0.30] 0.11 [0.02-0.20] 0.14 [0.03-0.25] 0.16 [0.06-0.26] 0.22 [0.10-0.34]
Infiltrate JVCS 0.49 [0.37-0.61] 0.30 [0.20-0.40] 0.27 [0.18-0.36] 0.22 [0.13-0.31] 0.21 [0.13-0.29] 0.57 [0.45-0.69]
  CRRS primary 0.33 [0.21-0.45] 0.24 [0.15-0.33] 0.31 [0.19-0.43] 0.15 [0.08-0.22] 0.22 [0.12-0.32] 0.41 [0.30-0.52]
  CRRS secondary -0.05 [-0.18-0.08] 0.13 [0.03-0.23] -0.02 [-0.12-0.08] -0.04 [-0.14-0.06] -0.02 [-0.12-0.08] 0.02 [-0.03-0.07]
Nodule JVCS 0.27 [0.14-0.40] 0.11 [0.05-0.17] 0.26 [0.14-0.38] 0.09 [0.03-0.15] 0.31 [0.20-0.42] 0.19 [0.11-0.27]
  CRRS primary 0.37 [0.25-0.49] 0.13 [0.06-0.20] 0.40 [0.28-0.52] 0.09 [0.03-0.15] 0.24 [0.12-0.36] 0.21 [0.13-0.29]
  CRRS secondary 0.22 [0.10-0.34] 0.22 [0.11-0.33] 0.14 [0.02-0.26] 0.13 [0.03-0.23] 0.29 [0.16-0.42] 0.22 [0.12-0.32]
  1. * Primary and secondary lesions are described in CRRS
  2. JVCS Japan-Vietnam chest X-ray coding system, CRRS chest radiograph reading and recording system, TB tuberculosis, NA not applicable, JP-JP a comparison between the Japanese raters, JP-VN [1] to [4] comparisons between Japanese-Vietnamese raters, VN-VN a comparison between the Vietnamese raters