Table 9.

Descriptive statistics for postswallow residue.

Location	Measurement approach	Metric	Thin	Slightly thick	Mildly thick	Moderately thick	Extremely thick
Valleculae	% full	M	16	19	25	12	11
		SD	31	33	39	26	26
		95% CI lower bound	10	13	18	7	6
		95% CI upper bound	22	26	33	17	16
	% of squared C2–C4 reference scalar	M	0.38	0.59	0.63	0.31	0.33
		SD	0.83	1.22	1.02	0.67	0.78
		95% CI lower bound	0.21	0.35	0.43	0.17	0.17
		95% CI upper bound	0.54	0.82	0.83	0.44	0.48
	Normalized Residue Ratio Scale	M	0.02	0.03	0.04	0.02	0.02
		SD	0.07	0.08	0.08	0.04	0.05
		95% CI lower bound	0.01	0.02	0.03	0.01	0.01
		95% CI upper bound	0.04	0.05	0.06	0.02	0.03
Pyriform sinuses	% full	M	1	3	4	2	2
		SD	5	7	7	5	4
		95% CI lower bound	1	2	2	1	1
		95% CI upper bound	2	4	5	3	3
	% of squared C2–C4 reference scalar	M	0.18	0.27	0.31	0.16	0.12
		SD	0.79	0.87	0.64	0.43	0.41
		95% CI lower bound	0.03	0.10	0.19	0.08	0.03
		95% CI upper bound	0.34	0.44	0.44	0.25	0.20
	Normalized Residue Ratio Scale	M	0.00	0.01	0.00	0.00	0.00
		SD	0.02	0.02	0.02	0.01	0.01
		95% CI lower bound	0.00	0.00	0.00	0.00	0.00
		95% CI upper bound	0.01	0.01	0.01	0.00	0.00
Elsewhere in the pharynx	% of squared C2–C4 reference scalar	M	0.08	0.18	0.17	0.11	0.08
		SD	0.31	0.49	0.41	0.35	0.35
		95% CI lower bound	0.02	0.08	0.10	0.04	0.01
		95% CI upper bound	0.14	0.27	0.25	0.18	0.15
Total (all pharyngeal areas combined)	% of squared C2–C4 reference scalar	M	0.68	1.04	1.15	0.57	0.55
		SD	1.52	1.83	1.59	0.93	1.14
		95% CI lower bound	0.38	0.69	0.83	0.38	0.32
		95% CI upper bound	0.99	1.39	1.46	0.76	0.78

Note. CI = confidence interval.