Table 2.

Content validity of DSRS sub-scales assessed by 10 UK speech and language therapists.

Item	Rating 3 or 4 (N of 3, 4)	I-CVI	Rating	S-CVI	Rating
Fluids sub-scale
No oral fluids	9 (1, 8)	0.90	Excellent	0.84	Good
Pudding consistency	7 (3, 4)	0.70	Good
Custard consistency	8 (1, 7)	0.80	Excellent
Syrup consistency	8 (1, 7)	0.80	Excellent
Normal fluids	10 (2, 8)	1.00	Excellent
Diet sub-scale
Non oral feeding	9 (1, 8)	0.90	Excellent	0.84	Good
Puree (mashed)	10 (0, 10)	1.00	Excellent
Soft, moist diet	9 (1, 8)	0.90	Excellent
Selected textures	5 (3, 2)	0.50	Fair
Normal diet	9 (0, 9)	0.90	Excellent
Supervision
No oral feeding	9 (2, 7)	0.90	Excellent	0.96	Excellent
Therapeutic feeding	10 (0, 10)	1.00	Excellent
Feeding by third party	9 (0, 9)	0.90	Excellent
Eating with supervision	10 (0, 10)	1.00	Excellent
Eating independently	10 (0, 10)	1.00	Excellent

Interpretation of I-CVI: Excellent >0.78; Good > 0.60–0.78; Fair >0.40- < 0.60 15.

Interpretation of S-CVI: Excellent >0.90; Good >0.80- < 0.90¹⁵.

S-CVI is average of I-CVI in sub-scale.