data-ncgsL: Data From National Cooperative Gallstone Study (Long Format)

In LMMstar: Repeated Measurement Models for Discrete Times

Data From National Cooperative Gallstone Study (Long Format)

Description

Data from the National Cooperative Gallstone Study (NCGS), a randomized study where the level of serum cholesterol was measured at baseline and after intake of high-dose chenondiol (750mg/day) or placebo. This dataset is in the long format (i.e. one line per measurement).

• group: treatment group (highdose or placebo).

• id: patient identifier.

• visit: visit index.

• cholest: cholesterol measurement.

• time: time after the start of the study at which the measurement has been done (in month). Treatment is given at 0+.

Usage

data(ncgsL)

References

Grundy SM, Lan SP, Lachin J. The effects of chenodiol on biliary lipids and their association with gallstone dissolution in the National Cooperative Gallstone Study (NCGS). J Clin Invest. 1984 Apr;73(4):1156-66. doi: 10.1172/JCI111301.

LMMstar documentation built on Nov. 9, 2023, 1:06 a.m.