Table 2.

Item characteristics of the final 41 items of the Rasch Everyday Activities Limitations item bank

ICF code	Item	${\mathit{\beta }}_1$	${\mathit{\beta }}_2$	${\mathit{\beta }}_3$	${\mathit{\beta }}_4$	Effect size (%)	H ij coefficient
d65506	Cleaning the oven	29	13	9	0	0.2	0.68
d6201	Clothes shopping	27	21	10	0	0.4	0.69
d65502	Turning in light bulbs overhead	29	21	15	6	0.2	0.67
d65501	Sweeping outside surfaces	31	20	18	3	0.6	0.67
d6102	Moving light furniture	36	25	12	0	0.2	0.70
d6201	Carrying groceries	35	20	16	8	0.8	0.74
d6402	Cleaning bathroom	33	23	18	7	0.8	0.73
d6402	Making a double bed	37	23	17	5	0.2	0.71
d65502	Tightening nuts and bolts	29	25	18	12	0.4	0.67
d6402	Cleaning windows	32	22	17	14	0.6	0.73
d6600	Helping children dress	30	19	14	23	0.8	0.67
d65505	Walking a leashed dog	24	21	16	27	0.6	0.67
d6600	Helping children wash and dry	30	22	10	26	0.8	0.67
d6503	Washing the car	33	26	20	14	1.6	0.73
d6403	Vacuuming stairs	36	23	19	17	1.4	0.75
d6550	Heavy ironing	34	27	17	17	1.2	0.58
d6201	Carrying bags of fruit	41	22	20	16	1.2	0.76
d6601	Pushing a wheelchair 15 min	37	27	21	18	0.8	0.75
d6601	Helping others up from a seating position	39	29	19	18	0.8	0.74
d65501	Weeding the front yard	43	30	20	16	1.4	0.70
d6405	Depositing two full trash bags	43	26	23	20	1.2	0.75
d65505	Trimming grass using scissors	46	35	26	21	1.4	0.74
d6601	Helping others up from a laying position	50	34	26	21	0.8	0.74
d65505	Pruning hedges	47	36	29	25	1.2	0.73
d65505	Mowing the lawn with a hand mower	45	39	32	25	1.6	0.74
d6102	Redecorating the living room	57	41	32	21	1.2	0.75
d6601	Helping adults in an out of a tub bath	54	40	30	29	0.4	0.72
d65501	Repairing carpentry around the house	47	40	32	36	0.4	0.68
d65501	Painting living room walls	50	40	33	32	2.0	0.72
d65501	Making repairs around the house	52	40	31	32	0.0	0.67
d6102	Assembling a bookcase or wardrobe	53	38	34	30	0.6	0.73
d65505	Spading the garden	57	43	39	31	2.6	0.77
d65501	Hanging wallpaper	54	43	35	40	1.2	0.68
d6102	Carrying moving boxes inside the home	62	44	35	31	1.0	0.75
d65501	Painting the living room	59	42	37	35	2.6	0.74
d6601	Helping a disabled person up two stairs	68	46	37	30	1.0	0.72
d65505	Doing yard work on knees for 1 h	63	48	39	33	2.0	0.75
d6102	Moving heavy furniture	71	49	40	33	0.8	0.75
d6102	Helping carry upstairs a washing machine	70	59	53	43	0.8	0.78
d6102	Helping carry inside heavy furniture	77	59	49	39	1.0	0.78
d6102	Helping someone carry upstairs a sofa	76	61	47	41	1.0	0.78

ICF International Classification of Functioning, Disability and Health; β Partial Credit Model Category intersection parameter; Effect size item fit statistic reflecting mean residuals across three score level groups; H-coefficient Loevinger’s coefficient of scalability, values >0.3 are considered .3 ≤ H _ij < 0.4 indicates useful but weak scalability. 0.4 ≤ H _ij < 0.5 indicates medium scalability. H _ij > 0.5 indicates excellent scalability