Skip to main content

Table 1 Inter-rater agreement with respect to general and 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 Inter-rater agreement
  system Kappa with 95% confidence interval and the absolute number of films (--/-+/+-/++)
   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)
Parenchymal JVCS NA NA NA NA NA NA
abnormality CRRS 0.63 [0.51-0.75] 0.24 [0.16-0.32] 0.50 [0.38-0.62] 0.25 [0.16-0.34] 0.58 [0.46-0.70] 0.27 [0.17-0.37]
   (32/21/7/185) (9/44/0/192) (24/29/6/187) (7/32/2/205) (22/17/8/198) (6/3/24/222)
Calcification* JVCS 0.62 [0.49-0.75] 0.47 [0.35-0.59] 0.21 [0.12-0.30] 0.55 [0.42-0.68] 0.30 [0.21-0.39] 0.26 [0.17-0.35]
   (188/13/14/30) (187/14/22/23) (198/2/38/7) (190/12/18/25) (201/0/34/9) (215/2/31/7)
  CRRS 0.28 [0.15-0.41] 0.35 [0.23-0.47] 0.15 [0.04-0.26] 0.36 [0.25-0.47] 0.36 [0.25-0.47] 0.17 [0.09-0.25]
   (219/10/11/5) (206/23/6/10) (226/4/14/2) (208/23/5/10) (228/2/11/4) (219/2/30/4)
Pleural JVCS 0.58 [0.45-0.71] 0.77 [0.64-0.90] 0.66 [0.54-0.78] 0.64 [0.51-0.77] 0.54 [0.41-0.67] 0.73 [0.61-0.85]
effusion   (222/8/5/10) (226/5/2/13) (222/8/3/12) (221/6/6/12) (217/9/7/11) (230/6/4/15)
Pleural JVCS 0.35 [0.23-0.47] 0.22 [0.14-0.30] 0.45 [0.33-0.57] 0.28 [0.18-0.38] 0.45 [0.32-0.58] 0.31 [0.22-0.40]
thickening   (158/39/19/29) (88/110/2/46) (161/36/14/34) (84/93/6/62) (148/28/26/42) (87/4/95/69)
Pleural CRRS 0.30 [0.20-0.40] 0.16 [0.09-0.23] 0.46 [0.34-0.58] 0.45 [0.33-0.57] 0.54 [0.42-0.66] 0.32 [0.22-0.42]
abnormalities   (130/73/6/36) (83/120/3/39) (159/44/7/36) (76/60/10/100) (124/12/42/67) (81/6/91/77)
Pleural effusion/ CRRS 0.48 [0.36-0.60] 0.34 [0.22-0.46] 0.55 [0.43-0.67] 0.49 [0.36-0.62] 0.67 [0.55-0.79] 0.48 [0.36-0.60]
thickening**   (176/35/6/28) (168/43/11/23) (189/22/9/26) (156/26/23/41) (176/6/22/41) (173/14/33/35)
  1. * In CRRS, calcification here indicates calcified granuloma only
  2. **In CRRS, pleural effusion and thickening are combined
  3. 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, (--/-+/+-/++) (negative findings by both raters/positive findings only by the second rater/positive findings only by the first rater/positive findings by both raters)