Description

PAQUID is a prospective cohort study initiated in 1988 in South Western France to explore functional and cerebral ageing. This sample includes n=2561 subjects. Data contains a time-to-event, a type of event and two cognitive scores measured at baseline.

Format

A data frame with 2561 observations on the following 4 variables.

time

the time-to-event (in years).

status

the type of event 0 = censored, 1 = dementia onset and 2 = death without dementia.

DSST

score at the Digit Symbol Substitution Score Test. This test explores attention and psychomotor speed.

MMSE

score at the Mini Mental State Examination. This test is often used as an index of global cognitive performance.

Source

The data have been first made publicly available via the package timeROC.

References

Dartigues, J., Gagnon, M., Barberger-Gateau, P., Letenneur, L., Commenges, D., Sauvel, C., Michel, P., and Salamon, R. (1992). The paquid epidemiological program on brain ageing. Neuroepidemiology, 11(1):14–18.

Blanche, P., Dartigues, J. F., & Jacqmin-Gadda, H. (2013). Estimating and comparing time-dependent areas under receiver operating characteristic curves for censored event times with competing risks. Statistics in Medicine, 32(30), 5381-5397.

Examples