Cross-cultural adaptation and validation of the Amsterdam Instrumental Activities of Daily Living questionnaire short version German for Switzerland

Table 2 Construct validation Spearman’s correlation coefficients of T-Scores of the A-IADL-Q-SV German with clinical measures

Measure	Hypothesized correlations		n	Observed correlations [95% CI]
Measure	Direction	Range	n	Observed correlations [95% CI]
Age	−	0.0–0.2	56	− 0.39	[− 0.60, − 0.15]
Education^a	+	0.0–0.2	56	0.07	[− 0.19, − 0.33]
Everyday functioning
CDR	−	0.2–0.4	56	− 0.35	[− 0.56, − 0.09]
IQCODE	−	0.4–0.7	53	− 0.69	[− 0.81, − 0.51]
Lawton Brody scale^b	−	0.4–0.7	53	− 0.41	[− 0.61, − 0.16]
Cognitive function
MMSE	+	0.2–0.4	56	0.38	[− 0.13, − 0.58]
Depression
DIA-S	−	0.0–0.2	53	0.01	[− 0.028, − 0.27]

CDR Cumulative Dementia Rating, IQCODE Informant Questionnaire for Cognitive Decline in the Elderly, MMSE Mini Mental State Examination, DIA-S Depression in old age scale
^aLevel of education in accordance with the international standard classification of education: ISCED (1 = ISCED 2, 2 = ISCED 3–5, 3 = ISCED 6, 4 = ISCED 7, 5 = ISCED 8)
^bDichotomized impaired = 1/non impaired = 0

ISSN: 1477-7525