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Tennis Elbow Diagnosis Using Equivalent Uniform Voltage to Fit the Logistic and the Probit Diseased Probability Models.

Lee TF, Lin WC, Wang HY, Lin SY, Wu LF, Guo SS, Huang HJ, Ting HM, Chao PJ - Biomed Res Int (2015)

Bottom Line: TV50 is the threshold equivalent uniform voltage predicting a 50% risk of disease.The fitted DP parameters were TV50 = 153.0 mV (CI: 136.3-169.7 mV), γ 50 = 0.84 (CI: 0.78-0.90) and TV50 = 155.6 mV (CI: 138.9-172.4 mV), m = 0.54 (CI: 0.49-0.59) for logistic and probit models, respectively.When the EUV ≥ 153 mV, the DP of the patient is greater than 50% and vice versa.

View Article: PubMed Central - PubMed

Affiliation: Medical Physics and Informatics Laboratory of Electronics Engineering, National Kaohsiung University of Applied Sciences, 415 Chien Kung Road, San-Min District, Kaohsiung 80778, Taiwan.

ABSTRACT
To develop the logistic and the probit models to analyse electromyographic (EMG) equivalent uniform voltage- (EUV-) response for the tenderness of tennis elbow. In total, 78 hands from 39 subjects were enrolled. In this study, surface EMG (sEMG) signal is obtained by an innovative device with electrodes over forearm region. The analytical endpoint was defined as Visual Analog Score (VAS) 3+ tenderness of tennis elbow. The logistic and the probit diseased probability (DP) models were established for the VAS score and EMG absolute voltage-time histograms (AVTH). TV50 is the threshold equivalent uniform voltage predicting a 50% risk of disease. Twenty-one out of 78 samples (27%) developed VAS 3+ tenderness of tennis elbow reported by the subject and confirmed by the physician. The fitted DP parameters were TV50 = 153.0 mV (CI: 136.3-169.7 mV), γ 50 = 0.84 (CI: 0.78-0.90) and TV50 = 155.6 mV (CI: 138.9-172.4 mV), m = 0.54 (CI: 0.49-0.59) for logistic and probit models, respectively. When the EUV ≥ 153 mV, the DP of the patient is greater than 50% and vice versa. The logistic and the probit models are valuable tools to predict the DP of VAS 3+ tenderness of tennis elbow.

No MeSH data available.


Related in: MedlinePlus

(a) Surface EMG signal from diseased patient with ten cycles of wrist ROM. (b) Detailed view of one surface EMG cycle of wrist ROM.
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fig6: (a) Surface EMG signal from diseased patient with ten cycles of wrist ROM. (b) Detailed view of one surface EMG cycle of wrist ROM.

Mentions: One normal control signal with ten cycles of wrist ROM is shown in Figure 5(a). Figure 5(b) is the detailed view of one cycle. One sample of diseased signal is shown in Figure 6(a), and Figure 6(b) is the detailed view. Figure 7 shows all samples EMG AVTH signals and (b) shows the mean samples EMG AVTH signals for group with/without VAS 3+ tenderness of tennis elbow. Blue line is of normal subjects and red lines represent diseased subjects.


Tennis Elbow Diagnosis Using Equivalent Uniform Voltage to Fit the Logistic and the Probit Diseased Probability Models.

Lee TF, Lin WC, Wang HY, Lin SY, Wu LF, Guo SS, Huang HJ, Ting HM, Chao PJ - Biomed Res Int (2015)

(a) Surface EMG signal from diseased patient with ten cycles of wrist ROM. (b) Detailed view of one surface EMG cycle of wrist ROM.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4561943&req=5

fig6: (a) Surface EMG signal from diseased patient with ten cycles of wrist ROM. (b) Detailed view of one surface EMG cycle of wrist ROM.
Mentions: One normal control signal with ten cycles of wrist ROM is shown in Figure 5(a). Figure 5(b) is the detailed view of one cycle. One sample of diseased signal is shown in Figure 6(a), and Figure 6(b) is the detailed view. Figure 7 shows all samples EMG AVTH signals and (b) shows the mean samples EMG AVTH signals for group with/without VAS 3+ tenderness of tennis elbow. Blue line is of normal subjects and red lines represent diseased subjects.

Bottom Line: TV50 is the threshold equivalent uniform voltage predicting a 50% risk of disease.The fitted DP parameters were TV50 = 153.0 mV (CI: 136.3-169.7 mV), γ 50 = 0.84 (CI: 0.78-0.90) and TV50 = 155.6 mV (CI: 138.9-172.4 mV), m = 0.54 (CI: 0.49-0.59) for logistic and probit models, respectively.When the EUV ≥ 153 mV, the DP of the patient is greater than 50% and vice versa.

View Article: PubMed Central - PubMed

Affiliation: Medical Physics and Informatics Laboratory of Electronics Engineering, National Kaohsiung University of Applied Sciences, 415 Chien Kung Road, San-Min District, Kaohsiung 80778, Taiwan.

ABSTRACT
To develop the logistic and the probit models to analyse electromyographic (EMG) equivalent uniform voltage- (EUV-) response for the tenderness of tennis elbow. In total, 78 hands from 39 subjects were enrolled. In this study, surface EMG (sEMG) signal is obtained by an innovative device with electrodes over forearm region. The analytical endpoint was defined as Visual Analog Score (VAS) 3+ tenderness of tennis elbow. The logistic and the probit diseased probability (DP) models were established for the VAS score and EMG absolute voltage-time histograms (AVTH). TV50 is the threshold equivalent uniform voltage predicting a 50% risk of disease. Twenty-one out of 78 samples (27%) developed VAS 3+ tenderness of tennis elbow reported by the subject and confirmed by the physician. The fitted DP parameters were TV50 = 153.0 mV (CI: 136.3-169.7 mV), γ 50 = 0.84 (CI: 0.78-0.90) and TV50 = 155.6 mV (CI: 138.9-172.4 mV), m = 0.54 (CI: 0.49-0.59) for logistic and probit models, respectively. When the EUV ≥ 153 mV, the DP of the patient is greater than 50% and vice versa. The logistic and the probit models are valuable tools to predict the DP of VAS 3+ tenderness of tennis elbow.

No MeSH data available.


Related in: MedlinePlus