Research ArticleMinimally Invasive Surgery

Minimal Clinically Important Difference in Patient-Reported Outcome Measures with the Transforaminal Endoscopic Decompression for Lateral Recess and Foraminal Stenosis

KAI-UWE LEWANDROWSKI, PAULO SÉRGIO TEIXEIRA DE CARVALHO, PAULO DE CARVALHO and ANTHONY YEUNG
International Journal of Spine Surgery April 2020, 14 (2) 254-266; DOI: https://doi.org/10.14444/7034

Article Figures & Data

Figures

  • Figure 1
    Figure 1

    Age distribution of the 406 study patients with the superimposed expected normal distribution if it existed (black line). Patient's age ranged from 30 to 84 years of age and averaged 41.08 years with an SD of 12.74. There was with a trimodal distribution with patients between the ages of 30 and 35 years making up 53.8% of the entire study population (frequency table not shown). The second largest group of patients was between the ages of 39 to 46 years of age (13.9% of study population) followed by third group of patients between the ages of 51 to 65 of years (17.6% of study population).

  • Figure 2
    Figure 2

    The trimodal age distribution of the 406 study patients is illustrated in the detrended normal P-P plot of endoscopy patients' age with an estimated location parameter of 3.67.

  • Figure 3
    Figure 3

    Receiver operating characteristic (ROC) curve for postoperative visual analog scale (VAS) scores given by patients who underwent outpatient transforaminal endoscopic decompression surgery. The area under the curve (AUC) individual test results for postoperative VAS are listed in Tables 5A and 5B. The AUC was 0.926 with an asymptotic 95% confidence interval lower limit of 0.882 and upper limit of 0.97.

  • Figure 4
    Figure 4

    Receiver operating characteristic (ROC) curve for postoperative Oswestry Disablity Index (ODI) scores given by patients who underwent outpatient transforaminal endoscopic decompression surgery. The area under the curve (AUC) individual test results for postoperative ODI are listed in Tables 6A and 6B. The AUC was 0.751 with an asymptotic 95% confidence interval lower limit of 0.663 and upper limit of 0.840.

Tables

  • Table 1
  • Table 2
  • Table 3
  • Table 4
  • Table 5A
  • Table 5B
  • Table 6A
  • Table 6B
  • Table 7
  • Table 8
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Minimal Clinically Important Difference in Patient-Reported Outcome Measures with the Transforaminal Endoscopic Decompression for Lateral Recess and Foraminal Stenosis
KAI-UWE LEWANDROWSKI, PAULO SÉRGIO TEIXEIRA DE CARVALHO, PAULO DE CARVALHO, ANTHONY YEUNG
International Journal of Spine Surgery Apr 2020, 14 (2) 254-266; DOI: 10.14444/7034
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