Kappa Coefficient

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I. U. H. Mian - One of the best experts on this subject based on the ideXlab platform.

Mohamed Shoukri - One of the best experts on this subject based on the ideXlab platform.

John M Mazur - One of the best experts on this subject based on the ideXlab platform.

  • interobserver reliability and intraobserver reproducibility of the system of king et al for the classification of adolescent idiopathic scoliosis
    Journal of Bone and Joint Surgery American Volume, 1998
    Co-Authors: R J Cummings, E A Loveless, S Samelson, J. Campbell, John M Mazur
    Abstract:

    The classification of adolescent idiopathic scoliosis with use of the system of King et al. has become widely accepted since its introduction. The purpose of the present study was to establish the interobserver reliability and intraobserver reproducibility of this classification system. The preoperative radiographs of sixty-three patients who were managed operatively for adolescent idiopathic scoliosis were classified by five observers with the system of King et al. Interobserver reliability was assessed by comparison of the classification of the curves among the observers, and intraobserver reproducibility was evaluated by comparison of the classifications of each set of radiographs by each observer on two occasions three weeks apart. The median interobserver reliability Kappa Coefficient for the classification system of King et al. was 0.44 (range, 0.28 to 0.50), and the median intraobserver reproducibility Kappa Coefficient was 0.64 (range, 0.44 to 0.72). According to the definition of Landis and Koch, the classification system of King et al. is substantially reproducible but is only moderately reliable. However, according to the stricter definition of Svanholm et al., its reproducibility is only fair and its reliability is poor.

Mufei Li - One of the best experts on this subject based on the ideXlab platform.

  • Serial testing of Mycobacterium tuberculosis infection in Chinese village doctors by QuantiFERON-TB Gold Plus, QuantiFERON-TB Gold in-Tube and T-SPOT.TB
    Journal of Infection, 2019
    Co-Authors: Haoran Zhang, Dakuan Wang, Jinxing Wang, Xiangwei Li, Boxuan Feng, Mufei Li
    Abstract:

    Summary Objectives To evaluate the performance of QuantiFERON-TB Gold Plus (QFT-Plus) on Mycobacterium tuberculosis (MTB) infection test among registered village doctors from China. Methods MTB infection of the registered village doctors in Zhongmu County were tested using QFT-Plus and two other interferon-gamma release assays (IGRAs) in parallel: QuantiFERON-TB Gold In-Tube (QFT) and T-SPOT.TB (T-SPOT). Retests were carried out for baseline positives at 3 and 6 months later, respectively. Results A total of 616 village doctors were included in the baseline examination. The positivity of QFT, QFT-Plus and T-SPOT was 27.91% (168/602), 31.22% (187/599) and 27.70% (169/610), respectively. The concordance between QFT and QFT-Plus was 94.81% (Kappa Coefficient: 0.87) and between T-SPOT and QFT-Plus was 88.93% (Kappa Coefficient: 0.73). Reversions were frequently observed for all three assays. With respect to QFT-Plus, the quantitative results of reversions in the serial testing were mostly distributed in an “uncertain range” zone (0.2-0.7 IU/mL). Similar patterns of distribution were observed for QFT and T-SPOT as well. Conclusion Village doctors should gain more attention as an at-risk group for TB infection control in rural China. Our results support, by means of serial testing, a good agreement between QFT-Plus and QFT in Chinese population.

Jose Luis Lazaromartinez - One of the best experts on this subject based on the ideXlab platform.