Orthodont

0th

Percentile

Growth curve data on an orthdontic measurement

The Orthodont data frame has 108 rows and 4 columns of the change in an orthdontic measurement over time for several young subjects.

Keywords
datasets
Details

Investigators at the University of North Carolina Dental School followed the growth of 27 children (16 males, 11 females) from age 8 until age 14. Every two years they measured the distance between the pituitary and the pterygomaxillary fissure, two points that are easily identified on x-ray exposures of the side of the head.

source

Pinheiro, J. C. and Bates, D. M. (2000), Mixed-Effects Models in S and S-PLUS, Springer, New York. (Appendix A.17)

Potthoff, R. F. and Roy, S. N. (1964), ``A generalized multivariate analysis of variance model useful especially for growth curve problems'', Biometrika, 51, 313--326.

Aliases
  • Orthodont
Examples
data(Orthodont)
formula(Orthodont)
plot(Orthodont)
Documentation reproduced from package lme4, version 0.6-6, License: GPL version 2 or later

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