paquid {lcmm}

Longitudinal data on cognitive and physical aging in the elderly

Description

The dataset consists in a subsample of the Paquid prospective cohort study. Repeated measures cognitive measures (MMSE, IST, BVRT psychometric tests), physical dependency (HIER) and depression sympatomatology (CESD) were collected over a maximum period of 20 years along with dementia information (age at dementia diagnosis, dementia diagnosis information). Time-independent socio-demographic information is also provided (CEP, male, age_init).

Format

A data frame with 2250 observations over 500 subjects and 12 variables:

ID

subject identification number

MMSE

score at the Mini-Mental State Examination (MMSE), a psychometric test of global cognitive functioning (integer in range 0-30)

BVRT

score at the Benton Visual Retention Test (BVRT), a psychometric test of spatial memory (integer in range 0-15)

IST

score at the Isaacs Set Test (IST) truncated at 15 seconds, a test of verbal memory (integer in range 0-40)

HIER

score of physical dependency (0=no dependency, 1=mild dependency, 2=moderate dependency, 3=severe dependency)

CESD

score of a short self-report scale CES-D designed to measure depressive symptomatology in the general population (integer in range 0-52)

age

age at the follow-up visit

dem

indicator of positive diagnosis of dementia

agedem

age at dementia diagnosis for dem=1 and at last contact for dem=0

age_init

age at entry in the cohort

CEP

binary indicator of educational level (CEP=1 for subjects who graduated from primary school; CEP=0 otherwise)

male

binary indicator for gender (male=1 for men; male=0 for women)

References

Letenneur, L., Commenges, D., Dartigues, J. F., & Barberger-Gateau, P. (1994). Incidence of dementia and Alzheimer's disease in elderly community residents of southwestern France. International Journal of Epidemiology, 23 (6), 1256-61.

Examples

summary(paquid)