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Longitudinal epilepsy data from Morris et al. (1977) . This documentation is based on Chapter 14.2 of Skrondal and Rabe-Hesketh (2004) , where the dataset is used. See also Rabe-Hesketh et al. (2003) .

Usage

diet

Format

diet A data frame with 236 rows and 7 columns:

id

Subject ID.

age

Age (standardized).

bus

Dummy variable indicating whether the subject is a bus driver or banking staff.

item

Integer indicating whether the outcome is fiber intake at time 1 (item = 1), fiber intake at time 2 (item = 2), or coronary heart disease (item = 3).

y

Outcome.

chd

Dummy variable indicating whether y is an indicator for coronary heart disease, coded as 0/1.

fiber

Dummy variable indicating whether y is a fiber measurement at either timepoint 1 or 2.

fiber2

Dummy variable indicating whether y is a fiber measurement at timepoint 2.

References

Morris JN, Marr JW, Clayton DG (1977). “Diet and Heart: A Postscript.” Br Med J, 2(6098), 1307--1314. ISSN 0007-1447, 1468-5833, doi:10.1136/bmj.2.6098.1307 .

Rabe-Hesketh S, Pickles A, Skrondal A (2003). “Correcting for Covariate Measurement Error in Logistic Regression Using Nonparametric Maximum Likelihood Estimation.” Statistical Modelling, 3(3), 215--232. ISSN 1471-082X, doi:10.1191/1471082X03st056oa .

Skrondal A, Rabe-Hesketh S (2004). Generalized Latent Variable Modeling, Interdisciplinary Statistics Series. Chapman and Hall/CRC, Boca Raton, Florida.