Effects of age and cognitive function on data quality of standardized surveys in nursing home populations

BMC Geriatrics

Table 3 Effects of MMSE, age, gender, and interview duration on item nonresponse

Spearman (r_s) correlation and eta² (ɲ²) statistics^a
	Duration*INR (r_s)	Age*INR (r_s)	Gender*INR (ɲ²)	MMSE*INR (r_s)
r_s/ɲ², p (n)	−0.067, p ≈ 0.089 (640)	0.161, p < 0.001 (653)	0.004, p ≈ 0.081 (653)	−0.355, p < 0.001 (655)
BLR – Binary logistic regression statistics^a (factor: MMSE 10–17 vs. 18–30, n = 655)
Response	B (SE)	Wald	OR [CI 95%]	p
> 0% INR	1.02	22.4	2.78 [1.82–4.25]	p < 0.001
> 5% INR	1.34	45.2	3.83 [2.58–5.66]	p < 0.001
> 10% INR	1.46	42.6	4.31 [2.78–6.68]	p < 0.001
MLR – Multiple linear regression statistics^a (enter-model, response: INR, n = 637)
Factor	B (SE)	β	t	p
Duration	0.00 (0.00)	0.04	1.22	p ≈ 0.233
Age	0.14 (0.04)	0.12	3.22	p ≈ 0.001
MMSE	−0.65 (0.06)	−0.39	−10.82	p < 0.001
Gender	−0.92 (0.78)	− 0.04	−1.17	p ≈ 0.242
Sample	−0.77 (0.66)	−0.02	− 0.60	p ≈ 0.244
R²_corr	16.5%
F, p	32.79, p < 0.001
MLR – Multiple linear regression statistics^a (stepwise-model, response: INR, n = 637)
Factor	B (SE)	β	t	p
MMSE	−0.65 (0.06)	−0.40	−10.79	p < 0.001
Age	0.14 (0.04)	0.12	3.20	p < 0.001
R²_corr	16.7%
F, p	64.71, p < 0.001

MMSE Mini-Mental State Examination Score, INR Item nonresponse, Duration Interview duration, Sample Pre−/post-test-dummy, n Sample sizes, B Unstandardized coefficients, SE Standard error, OR Odds ratio, β Standardized coefficient, t t-statistic, R²_corr Adjusted determination coefficient; F F-statistic; ^a Number of test correction = 14 (α_corr = 0.00357, Bonferroni); ^b Excluded in step 2: duration, gender, sample

ISSN: 1471-2318