Tab 2.

Descriptive statistics of the calculated differences between the voice indices

Index	Mask	n	Mean	SD	SE	Min	Q0.1	Q0.25	Median	Q0.75	Q0.9	Max
AVQI	Without	31	0.452	0.286	0.051	0.03	0.13	0.255	0.36	0.640	0.75	1.13
	FFP2	31	0.509	0.413	0.074	0.04	0.13	0.220	0.49	0.725	0.86	1.95
	Surg	31	0.482	0.394	0.071	0.02	0.12	0.175	0.34	0.656	1.05	1.54
ABI	Without	31	0.480	0.368	0.066	0.01	0.06	0.205	0.41	0.600	0.98	1.53
	FFP2	31	0.685	0.480	0.086	0.00	0.13	0.445	0.57	0.925	1.21	2.28
	Surg	31	0.557	0.457	0.082	0.07	0.12	0.180	0.43	0.755	1.26	1.55

‘se’ denotes the standard error of the mean, ‘Q0.1’ is the 10% quantile, ‘Q0.25’ the 25% quantile and so on