Measuring self-reported ability to perform activities of daily living: a Rasch analysis

Wæhrens, Eva Ejlersen; Kottorp, Anders; Nielsen, Kristina Tomra

doi:10.1186/s12955-021-01880-z

Health and Quality of Life Outcomes

Table 4 Items measurement report

From: Measuring self-reported ability to perform activities of daily living: a Rasch analysis

ADL-I item	Count	Measure	SE	Infit		Outfit
ADL-I item	Count	Measure	SE	MnSq	z	MnSq	z
Weekly heavy cleaning (hardest item)	2020	2.38	0.03	1.09	2.66	1.16	2.95
Weekly/large quantity shopping^b	1847	1.80	0.03	1.04	1.36	1.04	0.93
Pedicuring	2103	1.75	0.03	1.81	9.90	1.96	9.90
Riding bicyckle/moped	687	1.60	0.04	1.51	8.71	1.53	6.76
Heavy washing in washing machine	1971	1.57	0.03	1.12	4.04	1.08	2.12
Going by train/boat/aeroplane^a	769	1.39	0.04	1.09	1.87	0.98	− 0.38
Light washing in washing machine	1983	1.32	0.03	1.15	5.05	1.10	2.55
Driving car	730	1.19	0.04	1.63	9.90	1.56	7.22
Go by bus/tram/tube^a	1300	1.18	0.03	1.03	0.73	1.01	0.22
Daily/small quantity shopping	2027	1.07	0.03	0.88	− 4.15	0.85	− 3.95
Daily light cleaning^b	2050	1.04	0.03	0.94	− 1.95	1.02	0.40
Cooking a hot meal	1874	0.99	0.03	1.16	4.86	1.31	6.96
Walking/moving in the neighbourhood	2106	0.75	0.03	0.76	− 8.64	0.83	− 4.40
Light washing by hand^b	1354	0.65	0.03	1.33	7.95	1.20	3.57
Walking/moving from one floor to another	2100	0.56	0.03	0.70	− 9.90	0.79	− 5.14
Washing body/bathing/showering	2120	0.46	0.03	0.58	− 9.90	0.66	− 8.50
Pulling on stockings/pantyhose/shoes	2122	0.36	0.03	0.78	− 7.13	0.94	− 1.27
Washing one’s hair	2116	0.34	0.03	0.91	− 2.92	0.91	− 2.00
Walking/moving in and out of the house	2119	0.26	0.03	0.80	− 6.51	0.76	− 5.26
Going by car^a	1884	0.22	0.03	1.01	0.29	1.02	0.30
Dressing lower trunk	2129	− 0.01	0.03	0.55	− 9.90	0.64	− 7.71
Preparing a cold meal	2060	− 0.07	0.03	0.89	− 2.85	0.79	− 3.98
Heating up liquid or prepared food	2007	− 0.10	0.03	1.05	1.30	0.90	− 1.84
Transferring the body from bed to chair	2132	− 0.15	0.03	0.72	− 7.89	0.86	− 2.64
Manicuring	2107	− 0.15	0.03	1.38	8.73	1.27	4.36
Walking/moving from one room to another	2130	− 0.19	0.03	0.72	− 7.99	0.77	− 4.40
Undressing	2128	− 0.23	0.03	0.60	− 9.90	0.59	− 8.23
Dressing upper trunk	2126	− 0.24	0.03	0.60	− 9.90	0.64	− 6.91
Transfer in bed, changing positions, turning over, sitting up	2122	− 0.33	0.03	0.82	− 4.59	0.94	− 0.89
Making plans for shopping	1999	− 0.48	0.04	1.57	9.90	1.54	6.85
Writing by hand/using word processor	2105	− 0.52	0.04	1.41	7.98	1.73	8.91
Getting necessary clothes from closets/drawers	2114	− 0.62	0.04	0.99	− 0.13	0.72	− 4.45
Getting to and from the toilet room in time	2108	− 0.64	0.04	0.78	− 5.12	0.75	− 3.85
Arranging clothes and equipment, washing hands	2107	− 0.76	0.04	0.70	− 6.86	0.55	− 7.15
Getting on/of toilet and cleaning one’s self after elimination	2115	− 0.77	0.04	0.78	− 4.82	0.68	− 4.84
Shaving/make-up	1985	− 0.78	0.04	1.55	9.06	1.42	4.78
Reading	2112	− 0.78	0.04	1.68	9.90	2.47	9.90
Getting food and liquid, cutting up food	2129	− 0.80	0.04	1.05	1.06	0.88	− 1.64
Washing hands and face	2126	− 1.10	0.05	0.84	− 3.05	0.63	− 4.95
Using the phone	2118	− 1.27	0.05	1.47	6.89	2.07	8.83
Bowel and urine elimination volitional	2115	− 1.29	0.05	1.37	5.44	2.04	8.59
Combing one’s hair^b	2109	− 1.29	0.05	1.14	2.22	1.10	1.08
Brushing teeth	2121	− 1.43	0.05	1.00	0.04	1.22	2.11
Taking part in a conversation	2121	− 1.51	0.06	1.05	0.73	1.80	8.33
Eating	2134	− 1.66	0.06	0.98	− 0.21	1.34	2.90
Calling for attention	2126	− 1.80	0.06	1.43	5.10	2.76	9.90
Drinking, getting liquid from glass into mouth (easiest item)	2132	− 1.92	0.07	1.04	0.52	1.31	2.41
Mean	1959.6	0.00	0.04	1.05	0.00	1.15	0.60
SD	362.2	1.07	0.01	0.32	6.30	0.50	5.40

Bold text indicates initially misfitting ADL-I items
^aItems starting to misfit, after removal of initially misfitting items
^bItems displaying differential item functioning (DIF) based on gender

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ISSN: 1477-7525

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