Table 4 Comparison of the numerical predictors between cases (N = 30) and controls (N = 30)

Fundamental frequency (Hz)

Controls

275.5

65.59

247

212–410

0.959

Cases

259.6

43.43

275

145–311.49

Mean fundamental frequency (Hz)

Controls

263.91

55.61

230

210–379

0.728

Cases

252.7

39.14

264.47

149–310.88

Jitter

(Hz)

Controls

0.84

0.41

0.99

0.06–1.5

< 0.0001*

Cases

2.04

1.28

1.8

0.59–5.81

Shimmer

(dB)

Controls

0.68

0.48

1.01

0.01–1.03

0.105

Cases

0.52

0.27

0.49

0.12–1.07

Noise to harmonics ratio

Controls

0.23

0.37

0.1

0.01–1.15

< 0.0001*

Cases