Arm activity measure (ArmA): psychometric evaluation of the Swedish version

Journal of Patient-Reported Outcomes

Table 5 Minimal important change estimated with a criterion-based approach for patients who underwent surgery or a distribution-based approach for patients who underwent surgery and had complete baseline measures

Method	n	ArmA-S Section A	n	ArmA-S Section B
Criterion-based approach
Whole group	55	6.1	55	6.5
HFR	17	6.2	17	11.2
LFR	29	5.0	29	5.8
NFR	9	8.3/9.1	9	0.7
Distribution-based approach
Whole group	61	3.2	61	6.8
HFR	21	2.6	20	6.2/6.5
LFR	29	3.3	28	5.2 (4.2^a)
NFR	11	2.8	10	9.7 (1.8^a)

^aScore achieved when one outlier was removed
ArmA-S Arm Activity Measure Swedish version, HFR High-functioning regimen, LFR Low-functioning regimen, NFR Non-functioning regimen