Proposition of a corrected measure of the Lawton instrumental activities of daily living score

Dufournet, Marine; Moutet, Claire; Achi, Sarah; Delphin-Combe, Floriane; Krolak-Salmon, Pierre; Dauphinot, Virginie

doi:10.1186/s12877-020-01995-w

BMC Geriatrics

Table 5 IADL and C-IADL modelisation (linear regression)

From: Proposition of a corrected measure of the Lawton instrumental activities of daily living score

	Outcome = IADL			Outcome = C-IADL
	b^a	SE	P Value	b^a	SE	P value
Age	−0.054	0.005	< 0.0001	−0.054	0.006	< 0.0001
Gender
Men	ref.			ref.
Women	1.089	0.085	< 0.0001	0.545	0.09	< 0.0001
Marital status
Married/in couple	ref.			ref.
Single	0.755	0.235	0.001	0.618	0.247	0.012
Divorced/separated	0.671	0.188	< 0.0001	0.53	0.197	0.007
Widowed	0.635	0.16	< 0.0001	0.599	0.168	< 0.0001
Unspecified	0.506	0.267	0.058	0.349	0.28	0.214
Educational level
Nil	ref.			ref.
Primary	0.187	0.109	0.085	0.202	0.114	0.077
Secondary	0.318	0.112	0.005	0.324	0.118	0.006
Tertiary	0.313	0.142	0.027	0.333	0.149	0.025
Lifestyle at baseline
At home with its husband/spouse	ref.			ref.
At home with relatives	−0.935	0.196	< 0.0001	−1.186	0.206	< 0.0001
At home, alone, with relatives in the neighborhood and other lifestyle	−0.032	0.161	0.844	−0.291	0.169	0.085
At home, alone, without relatives in the neighborhood	0.423	0.197	0.031	0.162	0.206	0.432
MMSE
[0,10[	−2.282	0.186	< 0.0001	−2.421	0.195	< 0.0001
[10,20[	−1.535	0.119	< 0.0001	− 1.56	0.125	< 0.0001
[20,26[	−0.865	0.104	< 0.0001	− 0.863	0.11	< 0.0001
[26, 30]	ref.			ref.
NPI score	−0.03	0.002	< 0.0001	−0.03	0.003	< 0.0001
Diagnosis stage
Subjective cognitive disorders	ref.			ref.
Mild neurocognitive disorders and other cases	0.056	0.103	0.589	0.032	0.108	0.768
Major neurocognitive disorders	−0.879	0.122	< 0.0001	− 0.982	0.128	< 0.0001
Absence of trouble	0.167	0.462	0.718	0.411	0.486	0.397
Etiology
Alzheimer’s disease	ref.			ref.
Alzheimer’s disease with cerebrovascular component	−0.188	0.174	0.283	− 0.124	0.183	0.498
Cognitive disorders of vascular origin	−0.343	0.151	0.023	−0.358	0.158	0.024
Lewy body disease	−0.006	0.291	0.983	0.103	0.305	0.736
Fronto temporal dementia	−1.904	0.579	0.001	−2.165	0.608	< 0.0001
Parkinson’s disease, and Parkinson’s syndroma	− 1.034	0.26	< 0.0001	− 1.084	0.273	< 0.0001
Psychiatric disorders	0.416	0.189	0.028	0.433	0.198	0.029
Other disorders	−0.033	0.224	0.883	0.054	0.236	0.817
Etiology not yet established	0.412	0.109	< 0.0001	0.498	0.115	< 0.0001
No trouble	1.238	0.259	< 0.0001	1.127	0.272	< 0.0001

C-IADL corrected Instrumental Activities of Daily Living score, IADL Instrumental Activities of Daily Living score, MMSE Mini-Mental Stage Examination, NPI Neuropsychiatric Inventory, ref. reference category
^a b: regression coefficient

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