Flag question: Spacer

Muscle tension dysphonia (MTD) can masquerade as adductor spasmodic dysphonia (ADSD), leading to diagnosis confusion. ADSD is a neurogenic, action induced, focal laryngeal dystonia wherein the speaker experiences involuntary hyper-adduction of the true vocal folds, producing debilitating voice breaks and an effortful strained-strangled voice quality. An investigation assessed the diagnostic worth of acoustic analysis of phonatory breaks as a possible objective test to distinguish ADSD from MTD.

The researchers recruited 148 participants. Among the 65 participants with ADSD, 60% tested positive. Among the 72 patients who tested negative, 64% had MTD.

Table 1 presents the results of the test

Diagnostic Test/Gold Standard

	Has ADSD	Has MTD	Total
T+ (i.e., phonatory break at 40 ms)	39	37	76
T- (i.e., phonatory break at <40 ms)	26	46	72
Total	65	83	148

Flag question: Question 1Question 10 pts

How many true positives are there?

Group of answer choices

37

46

39

26

Flag question: Question 2Question 20 pts

How many true negatives are there?

Group of answer choices

39

46

37

26

Flag question: Question 3Question 30 pts

Home many false positives are there

Group of answer choices

37

46

39

26

Flag question: Question 4Question 40 pts

How many false negatives are there?

Group of answer choices

46

37

39

26

Flag question: Question 5Question 50 pts

Calculate the sensitivity of the test.

Group of answer choices

0.6

0.55

0.51

0.64

Flag question: Question 6Question 60 pts

Calculate the specificity of the test

Group of answer choices

0.55

0.64

0.51

0.60

Flag question: Question 7Question 70 pts

Calculate the positive predictive value of the test .

Group of answer choices

0.64

0.51

0.55

0.6

Flag question: Question 8Question 80 pts

Calculate the negative predictive value of the test

Group of answer choices

0.6

0.51

0.55

0.64