Objective. Hand Mobility in Scleroderma (HAMIS) is a hand function test for
persons who have systemic sclerosis (scleroderma). The purpose of HAMIS is
to obtain an estimation of the hand mobility that is precise enough to det
ect limitation of motion at the same time as it indicates the ability to us
e the hand in daily occupations. The aim of this study was to test psychome
tric properties of the HAMIS, and the following aspects of HAMIS were exami
ned: 1) the applicability of HAMIS, 2) concurrent validity, and 3) discrimi
nating ability.
Methods. Forty-five patients with scleroderma were assessed for range of mo
tion (ROM), HAMIS, and skin thickness. In addition, 15 healthy individuals
completed HAMIS.
Results. The applicability of HAMIS was good for items assessing finger and
thumb mobility and moderate for items assessing mobility of the wrist and
the forearm. The relationships of HAMIS to ROM and skin score were statisti
cally significant for all items except for pronation and supination of the
forearm. There were also statistically significant differences between the
patients and the healthy individuals for all items except these two.
Conclusion. HAMlS has a demonstrated concurrent validity compared with ROM
and skin score, and it showed a good ability to discriminate between health
y individuals and persons with scleroderma, although a lack of variation in
the items measuring pronation and supination inferred worse psychometric p
roperties for these two items.