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

From: A study of voice quality in obese Egyptian children

Whole sample Mean SD Median Range p value
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 0.51 0.45 0.31 0.09–1.5
  1. *Significance (p value ≤ 0.05)