Table 2.

Posterior means and 95% credible intervals of the discrimination parameters for items in Katz scale

	Mean	SE	Q2.5	Q97.5
Bathing	1.291	0.003	1.261	1.317
Dressing	2.877	0.007	2.810	2.917
Toileting	4.124	0.015	3.984	4.286
Transferring	3.682	0.007	3.565	3.783
Continence	1.125	0.003	1.077	1.168
Feeding	2.137	0.004	2.071	2.197