| ncgsL {LMMstar} | R Documentation |
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.