Table 3.

Distribution of 0–4 ratings ^a (%) for ASRS items (see the Appendix for complete item labels); highest frequency for each item/group in boldface.

Item	Rating	AOS absent b			AOS present c
		Total group (n = 188)	Dysarthria present aphasia absent (n = 65)	Aphasia present dysarthria absent (n = 100)	Total group (n = 120)	Dysarthria and aphasia absent (n = 42)
1. Distortions	0	58	22	82	8	12
	1	24	31	17	34	43
	2	12	32	1	32	29
	3	4	9	—	15	12
	4	2	6	—	11	5
2. Distorted substitutions	0	83	97	72	14	24
	1	16	3	27	39	43
	2	1	—	1	25	21
	3	—	—	—	11	2
	4	—	—	—	11	10
3. Distorted additions	0	97	100	97	50	55
	1	3	—	3	35	36
	2	—	—	—	10	5
	3	—	—	—	2	2
	4	—	—	—	2	2
4. Increased errors with length/complexity	0	79	86	73	4	10
	1	18	11	23	33	40
	2	3	3	4	33	29
	3	—	—	—	18	14
	4	—	—	—	12	7
5. Segmentation within words	0	96	95	96	24	19
	1	4	5	4	34	43
	2	—	—	—	26	26
	3	—	—	—	12	7
	4	—	—	—	4	5
6. Segmentation across words	0	96	92	98	18	14
	1	3	5	2	21	24
	2	1	3	—	21	17
	3	—	—	—	30	33
	4	—	—	—	11	12
7. Slow rate	0	81	58	98	11	10
	1	11	25	1	18	17
	2	6	14	1	17	19
	3	1	3	—	32	36
	4	—	—	—	22	19
8. Lengthened segments	0	93	95	92	42	33
	1	7	5	8	49	57
	2	—	—	—	8	10
	3	—	—	—	—	—
	4	—	—	—	—	—
9. AMRs	0	72	48	88	37	48
	1	18	29	12	25	21
	2	8	18	—	23	21
	3	2	3	—	12	10
	4	1	2	—	2	—
10. SMRs	0	74	74	73	8	7
	1	14	14	13	21	31
	2	10	12	10	42	43
	3	2	—	4	22	12
	4	—	—	—	8	7
11. Reduced words or AMRs per breath	0	99	98	100	59	67
	1	—	—	—	15	17
	2	1	2	—	14	10
	3	—	—	—	8	7
	4	—	—	—	4	—
12. Visible/silent groping	0	96	100	95	57	74
	1	4	—	5	33	24
	2	—	—	—	5	2
	3	—	—	—	4	—
	4	—	—	—	1	—
13. Audible false starts/restarts	0	64	83	49	28	31
	1	29	12	43	48	60
	2	5	3	7	19	7
	3	2	2	1	3	2
	4	—	—	—	2	—
Total score Mdn (Q1, Q3)	0–52	2 (0, 5)	4 (2, 6)	1 (0, 4)	16 (12, 23)	14 (11, 22)

Note. Last row provides Total score median (Q1, Q3). Em dashes indicate no occurrence. ASRS = Apraxia of Speech Rating Scale; AOS = apraxia of speech; AMRs = alternating motion rates; SMRs = sequential motion rates.

^a 0 = feature not present; 4 = always evident or marked in severity.

^b In addition to the Dysarthria Present-Aphasia Absent and Aphasia Present-Dysarthria Absent subgroups shown here, the Total AOS Absent Group also contained participants with both aphasia and dysarthria (n = 3) and no aphasia or dysarthria (n = 20). Data for all subgroups are provided in Supplemental Material S1.

^c In addition to the dysarthria and aphasia absent subgroup shown here, the Total AOS Present Group also contained participants with both aphasia and dysarthria (n = 18), with aphasia but no dysarthria (n = 41), and with dysarthria but no aphasia (n = 19). Data for all subgroups are provided in the Supplemental Material S1.