Table 2.
Correlations among the clinical and demographic characteristics of patients and the scores on the Korean version of the Neuropsychiatric Inventory
| Variable | Statistics | P-value |
|---|---|---|
| Demographics and health-related behavior | ||
| Age (y)* | 0.019 | 0.517 |
| Gender (male/female)† | -0.041 | 0.967 |
| Education (y)* | -0.057 | 0.057 |
| Phone (use/not use)† | 2.999 | 0.003 |
| Previous heavy drinking† | 1.977 | 0.048 |
| Current alcohol drinking (drinker/non-drinker)† | -1.100 | 0.271 |
| Smoking history (current smoker/ex-smoker/non-smoker)‡ | 2.343 | 0.310 |
| Occupation_p (with/without)† | 0.136 | 0.892 |
| Occupation_c (with/without)† | 4.132 | <0.001 |
| Clinical assessment | ||
| Activities of daily living* | -0.257 | <0.001 |
| Seoul-Instrumental Activities of Daily Living* | 0.401 | <0.001 |
| Korean version of Mini-Mental Status Examination* | -0.134 | <0.001 |
| Clinical Dementia Rating Sum of Box* | 0.377 | <0.001 |
| Global Deterioration Scale* | 0.296 | <0.001 |
| Neuropsychological test (Seoul Neuropsychological Screening Battery-dementia score) | ||
| Attention* | -0.091 | 0.002 |
| Language* | -0.087 | 0.004 |
| Visuospatial* | -0.068 | 0.022 |
| Memory* | -0.112 | <0.001 |
| Frontal and executive* | -0.154 | <0.001 |
| Known medical history (with/without) | ||
| Diabetes mellitus† | -0.166 | 0.868 |
| Hypertension† | -0.684 | 0.494 |
| Heart disease† | -1.377 | 0.169 |
| Head trauma† | 0.173 | 0.863 |
| Carbon monoxide poisoning† | -1.280 | 0.201 |
| Brain surgery† | -0.354 | 0.724 |
| Abnormal free thyroxine† | -2.284 | 0.022 |
| Abnormal thyroid stimulating hormone† | -0.205 | 0.838 |
| Anemia† | -5.502 | <0.001 |
| Arthritis† | -1.762 | 0.078 |
| Epilepsy† | -1.315 | 0.188 |
| Gastrointestinal disease† | -2.978 | 0.003 |
| Dyslipidemia† | -1.122 | 0.262 |
| Alcoholics† | -0.971 | 0.332 |
| Depression† | -1.136 | 0.256 |
| Previous neuropsychiatric history† | -0.621 | 0.534 |
| Stroke family history (with/without)† | -3.414 | <0.001 |
| Dementia family history (with/without)† | -0.143 | 0.886 |
| Caregiver | ||
| Age (y)* | -0.099 | <0.001 |
| Gender (male/female)† | 3.489 | <0.001 |
| Living (with/without)† | -0.669 | 0.504 |
Occupation_p: patient who had an occupation in the past, Occupation_c: patient who has an occupation currently.
*
Continuous variables (spearman’s rank correlation coefficient, rho).
†
Two or fewer categorical variables (Wilcoxon signed rank-sum, Z).
‡
Three or more categorical variables (Kruskal-Willis rank test, X32).