A cross sectional study of upper extremity strength ten days after a stroke; relationship between patient-reported and objective measures

Table 2 Patient-reported strength in relation to an objective strength assessment

Strength classification using percentage of normative dynamometer values		Reduced	Good	All	Sensitivity	Specificity	PPV	NPV
		(JAMAR <80 %), n	(JAMAR ≥80 %), n	n	(95 % CI)	(95 % CI)	(95 % CI)	(95 % CI)
ARM strength	Reduced (SIS 1–3)	64	10	74
SIS 1a	Good (SIS 4–5)	9	16	25	0.87	0.62	0.86	0.64
SIS 1a	All	73	26	99	(0.779-0.942)	(0.410-0.800)	(0.766-0.933)	(0.425-0.820)
HAND strength	Reduced (SIS 1–3)	63	6	69
SIS 1b	Good (SIS 4–5)	10	20	30	0.86	0.77	0.91	0.67
SIS 1b	All	73	26	99	(0.763-0.932)	(0.564-0.910)	(0.820-0.967)	(0.472-0.827)

Abbreviations: CI, 95 % confidence interval; Dynamometer; JAMAR Hand Dynamometer; NPV, Negative Predicted Value; PPV, Positive Predicted Value; SIS, Stroke Impact Scale questions 1A and 1B

ISSN: 1471-2377