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. Author manuscript; available in PMC: 2021 Nov 1.
Published in final edited form as: Am J Intellect Dev Disabil. 2020 Nov 1;125(6):493–509. doi: 10.1352/1944-7558-125.6.493

Table 3.

MBA Item Frequencies

Response options
0 1 2 3 4
Item N (%) N (%) N (%) N (%) N (%)
Motor skillsa 38 (0.6) 741 (11.8) 1510 (24.0) 2170 (34.5) 1827 (29.1)
Communication skillsb 117 (1.9) 3451 (54.9) 1412 (22.5) 652 (10.4) 658 (10.5)
Poor eye/social contactc 1661 (26.4) 2229 (35.4) 1598 (25.4) 615 (9.8) 189 (3.0)
Lack of sustained interestc 1711 (27.2) 1829 (29.1) 1737 (27.6) 740 (11.8) 274 (4.4)
Irritability/cryingc 4957 (78.8) 995 (15.8) 223 (3.5) 71 (1.1) 46 (0.7)
Overactive/passivec 4179 (66.4) 624 (9.9) 620 (9.9) 477 (7.6) 392 (6.2)
Does not reach for objects or peoplec 1773 (28.2) 615 (9.8) 807 (12.8) 722 (11.5) 2373 (37.7)
Does not respond to spoken words/acts deafc 1262 (20.1) 1894 (30.1) 1741 (27.7) 754 (12.0) 639 (10.2)
Feeding difficultiesd 1838 (29.2) 1364 (21.7) 1405 (22.3) 1118 (17.8) 563 (9.0)
Chewing difficultiese 689 (11.0) 2427 (38.6) 1247 (19.8) 689 (11.0) 1235 (19.6)
Toilet trainingf 61 (1.0) 227 (3.6) 1280 (20.4) 1199 (19.1) 3520 (56.0)
Self-mutilation/pulling hair or ears/scratchingc 5577 (88.7) 483 (7.7) 141 (2.2) 55 (0.9) 34 (0.5)
Aggressive behaviorc 5713 (90.8) 418 (6.6) 110 (1.8) 30 (0.5) 20 (0.3)
Seizuresg 2833 (45.1) 1344 (21.4) 947 (15.1) 697 (11.1) 466 (7.4)
Insensitivity to painh 725 (11.5) 3238 (51.5) 1383 (22.0) 814 (13.0) 127 (2.0)
Speech disturbancesi 8 (0.1) 59 (0.9) 611 (9.7) 4296 (68.3) 1318 (21.0)
Bruxismc 3389 (53.9) 1490 (23.7) 725 (11.5) 409 (6.5) 277 (4.4)
Breath holdingc 2037 (32.4) 2169 (34.5) 1417(22.5) 452 (7.2) 216 (3.4)
Hyperventilationc 3134 (49.8) 1627 (25.9) 957 (15.2) 378 (6.0) 195 (3.1)
Air-saliva expulsion/droolingc 2125 (33.8) 1894 (30.1) 1238 (19.7) 530 (8.4) 504 (8.0)
Mouthing hands/objectsc 3441 (54.7) 1072 (17.0) 705 (11.2) 560 (8.9) 512 (8.1)
Biting self/othersc 5447 (86.6) 564 (9.0) 163 (2.6) 59 (1.0) 55 (1.0)
Hand clumsinessj 71 (1.1) 780 (12.4) 1045 (16.6) 1243 (19.8) 3152 (50.1)
Stereotypic hand activitiesc 144 (2.3) 300 (4.8) 577 (9.2) 1069 (17.0) 4200 (66.8)
Ataxia/apraxiac 87 (1.4) 181 (2.9) 165 (2.6) 214 (3.44) 5643 (89.7)
Truncal rockingc 3436 (54.7) 1153 (18.3) 1142 (18.2) 354 (5.6) 202 (3.2)
Bradykinesiak 4361 (69.3) 452 (7.2) 228 (10.6) 542 (8.6) 268 (4.3)
Dystonial 2792 (44.4) 869 (13.8) 1715 (27.3) 593 (9.4) 319 (5.1)
Scoliosism 2634 (41.9) 1562 (24.8) 749 (11.9) 381 (6.1) 963 (15.3)
Myoclonusc 5295 (84.2) 713 (11.3) 191 (3.0) 54 (0.9) 37 (0.6)
Dyskinesiac 4921 (78.3) 867 (13.8) 308 (4.9) 116 (1.8) 77 (1.2)
Hypertonia/rigidityn 3132 (49.8) 1021 (16.2) 568 (9.0) 759 (12.1) 810 (12.9)
Hyperreflexiao 4170 (66.3) 883 (14.0) 412 (6.6) 588 (9.4) 237 (3.8)
Vasomotor disturbancesp 2616 (41.6) 1919 (30.5) 1082 (17.2) 610 (9.7) 59 (0.9)
a

0 = No regression, 1 = Dyspraxia of gait and hand use including bilateral pincer grasp, 2 = Able to walk and use one or both hands, 3 = Able to walk independently or with support or use one or both hands, 4 = No motor skills.

b

0 = Effective communication, 1 = Consistently makes choices (> 50% of time), 2 = Sometimes makes choices (10–50% of time), 3 = rarely makes choices (<10% of time), 4 = No communication.

c

0 = None, 1 = 25% of time, 2 = 50% of time, 3 = 75% of time, 4 = 100% of time.

d

0 = None, 1 = Occasional chocking/gagging, 2 = More than 30 min = to feed, 3 = Oral and gastrostomy feeding, 4 = Gastrostomy only.

e

0 = None, 1 = Course chopped, 2 = Fine chopped, 3 = Pureed or mashed, 4 = Gastrostomy.

f

0 = Purposeful bowel and bladder control, continent at all times, 1 = Continent during the day, 2 = Time trained, both urine and stool, 3 = Time trained, urine or stool, 4 = Totally incontinent.

g

0 = None, 1 = None (last 6 months), with medications, 2 = Monthly, with or without medications, 3 = Weekly, with or without medications, 4 = Daily, with or without medications.

h

0 = Normal or immediate response to pain, 1 = delayed response (> 5 sec) to minor pain (shots/blood draw), 2 = No response to minor pain/delayed response to moderate pain (head bump/finger pinch/small laceration/small burn), 3 = No response to moderate pain/delayed response to major pain (major laceration/bone fracture/large burn), 4 = No response to pain of any type.

i

0 = Fluent, 1 = Phrases/sentences, 2 = Words with meaning or intention, 3 = Vocalizations, no words, 4 = No utterances

j

0 = Purposeful hand use, 1 = Plays with toys or activates switches purposefully, 2 = Uses utensils/cup, may be adaptive, 3 = Finger feed only, 4 = No purposeful hand use.

k

0 = None, 1 = Occasional paucity of limb movement (< 10% of time), 2 = Some limb movement (<50% of time), 3 = Occasional limb movement (<10% of time), 4 = Severe lack of limb movement (95–100% of time).

l

0 = None, 1 = Focal dystonia, one joint, 2 = Focal dystonia, more than one joint, 3 = Generalized dystonia, >2 extremities, 4 = Fixed positional deformity.

m

0 = None, 1 = 1–<20°, 2 = 20 −<40°, 3 = ≥40°, 4 = Surgery.

n

0 = None, 1 = Ankle hypertonia/rigidity, 2 = Upper or lower limb hypertonia/rigidity, 3 = Generalized hypertonia without contractures, 4 = Generalized hypertonia with contractures.

o

0 = Normal muscle stretch reflexes, 1 = 4+ ankles or knees, 2 = 4+ ankle and knees with clonus, 4+ all extremities with spread or clonus, 4 = 4+ all extremities with spread and clonus.

p

0 = Normal temperature and color, 1 = Temperature slightly off (cool or warm), normal color, 2 = Temperature extremely off (cold or hot), mottled, 3 = Temperature off in hands or feet, color changed (blue or red), 4 = Temperature off in hands and feet, color changed.