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Table 8 Association between acoustic parameters and Bloodstien (BLD) grade in the stuttering group

From: Acoustic characteristics of voice and speech in Arabic-speaking stuttering children

Items Grade I
n= 4
Grade II
n= 16
Grade III
n= 16
Grade IV
n= 4
Test of significance
I- Prolonged /a / vowel F0 295.5 ± 26.1 274.0 ± 35.7 267.9 ± 43.8 258.9 ± 25.4 F= 0.75
P= 0.53
Jitter 0.39
(0.23–0.55)
0.64
(0.25–2.4)
0.41
(0.3–2.0)
0.58
(0.24–0.89)
KW= 4.4
P= 0.22
Shimmer 5.3
(2.8–6.4)
5.3
(2.0–12.1)
4.8
(1.3–11.8)
7.2
(2.0–11.7)
KW= 0.56
P= 0.91
H/N ratio 18.9 ± 2.0 16.7 ± 4.1 18.4 ± 4.6 16.4 ± 3.1 F= 0.70
P= 0.56
II- Automatic speech F0 282.7 ± 26.1 257.7 ± 34.9 249.1 ± 44.4 251.8 ± 12.4 F= 0.89
P= 0.46
Jitter 1.7 ± 0.5 1.7 ± 0.5 1.5 ± 0.5 1.9 ± 0.6 F= 0.63
P= 0.59
Shimmer 8.9 ± 2.5 8.6 ± 2.9 8.5 ± 2.5 9.2 ± 3.0 F= 0.08
P= 0.97
H/N ratio 13.5 ± 2.6 13.2 ± 3.6 13.2 ± 2.5 12.4 ± 3.8 F= 0.11
P= 0.96
III- Spontaneous speech F0 299.4 ± 19.8 279.7 ± 44.3 268.3 ± 55.3 273.0 ± 11.6 F= 0.53
P= 0.67
Jitter 1.8 ± 0.3 1.6 ± 0.4 1.7 ± 0.5 1.7 ± 0.4 F= 0.13
P= 0.94
Shimmer 10.3
(6.7–14.8)
7.3
(5.4–14.5)
9.6
(4.7–13.8)
4.4
(1.6–11.2)
KW= 3.5
P= 0.32
H/N ratio 13.6 ± 3.2 14.3 ± 3.2 13.4 ± 3.2 13.7 ± 2.3 F= 0.23
P= 0.88