Table 5. Computed tomography perfusion parameters (percentage change from baseline) correlated to dysphagia severity at 3- and 6-month follow-up.

Parameter	No. of scans	Dysphagia Grade 0–2			Dysphagia Grade 3			p
		n	Mean	SE	n	Mean	SE
Blood flow
3-mo follow-up
Week 2	15	10	43.0	38.8	5	130.5	54.8	0.083
Week 4	14	9	195.1	70.6	5	275.8	94.8	0.366
Week 6	11	9	91.2	39.5	2	287.2	83.7	0.141
6 wk after RT	12	8	82.2	58.5	4	240.4	82.7	0.132
6-mo follow-up
Week 2	15	9	12.3	34.6	6	161.9	42.4	0.007
Week 4	14	8	205.4	75.9	6	248.6	87.7	0.417
Week 6	11	8	84.5	43.5	3	239.9	71.0	0.121
6 wk after RT	12	7	88.6	65.9	5	199.9	78.0	0.265
Blood volume
3-mo follow-up
Week 2	15	10	12.0	27.2	5	107.7	38.5	0.044
Week 4	14	9	58.3	45.4	5	162.8	60.9	0.189
Week 6	11	9	80.9	91.3	2	552.6	193.8	0.217
6 wk after RT	12	8	105.9	98.8	4	414.3	139.7	0.096
6-mo follow-up
Week 2	15	9	8.7	29.1	6	96.6	35.6	0.039
Week 4	14	8	54.6	48.5	6	150.4	56.0	0.163
Week 6	11	8	80.0	106.7	3	397.8	174.2	0.280
6 wk after RT	12	7	82.4	104.6	5	385.6	123.8	0.040
Capillary permeability
3-mo follow-up
Week 2	13	9	31.6	33.8	4	-48.3	50.6	0.090
Week 4	14	9	320.3	154.8	5	205.7	207.7	0.299
Week 6	10	8	589.7	482.3	2	1907.4	964.5	0.357
6 wk after RT	12	8	603.8	244.0	4	243.3	345.1	0.640
6-mo follow-up
Week 2	13	8	43.1	34.3	5	-50.7	43.4	0.062
Week 4	14	8	372.6	160.3	6	155.2	185.2	0.848
Week 6	10	7	652.4	546.4	3	1322.0	834.7	0.371
6 wk after RT	12	7	694.0	249.7	5	189.1	295.5	0.350
Mean transition time
3-mo follow-up
Week 2	15	10	29.0	20.6	5	25.0	29.2	0.944
Week 4	14	9	6.9	28.8	5	-13.3	38.7	0.802
Week 6	11	9	8.7	24.4	2	65.4	51.7	0.988
6 wk after RT	12	8	20.9	29.4	4	68.9	41.5	0.297
6-mo follow-up
Week 2	15	9	38.4	21.3	6	11.6	26.0	0.447
Week 4	14	8	9.5	30.5	6	-13.4	35.2	0.871
Week 6	11	8	15.5	27.2	3	28.4	44.3	0.524
6 wk after RT	12	7	28.7	32.5	5	48.5	38.4	0.578

Abbreviation as in Table 3.