Acoustic and videoendoscopic effects of temporary vocal fold augmentation in an office-based setting: a quasi-experimental study

The Egyptian Journal of Otolaryngology

Table 1 Acoustic analysis

	Pre-injection	2 months post-injection	P value	1 year post-injection (16 patients)		P value
Fundamental frequency (F0)			0.32	Pre-injection	Post-injection	0.049¹
Male	(15) 160.6 ± 65.76	(15) 150.4 ± 58.14		(9) 173.2 ± 83.21	(9) 165.0 ± 73.94
Female	(10) 234.2 ± 36.14	(10) 231.5 ± 39.17		(7) 248.1 ± 34.37	(7) 212.7 ± 19.76
Jitter	1.079 ± 0.89	0.949 ± 0.69	0.25	1.07 ± 0.93	0.64 ± 0.27	0.078
Shimmer	5.822 ± 3.015	4.909 ± 3.39	0.047	5.92 ± 3.41	3.936 ± 1.869	0.014
HNR	17.692 ± 5.22	19.576 ± 4.88	0.03	17.96 ± 5.812	21.94 ± 3.823	0.007

Table 1 shows a comparison between pre-injection and 2 months post-injection for 25 patients and another comparison between pre-injection and 1 year post-injection for the 16 patients who attended the 1 year follow-up assessment. Data are presented as mean values and standard deviation. HNR harmonic-to-noise ratio. Student’s paired t test was used
¹Wilcoxon signed-rank test