References
- Breiman , L. , Friedman , J. H. , Olshen , R. A. and Stone , C. J. 1984 . Classification and Regression Trees Belmont, CA : Wadsworth .
- Chuang-Stein , C. 1998 . Safety analysis in controlled clinical trials . Drug Inf. J. , 32 : 1363S – 1372S .
- Cole , T. J. and Green , P. J. 1992 . Smoothing reference centile curves: the LMS method and penalized likelihood . Stat. Med. , 11 : 1305 – 1319 .
- Cole , T. J. , Freeman , J. V. and Preece , M. A. 1998 . British 1990 growth reference centiles for weight, height, body mass index and head circumference fitted by maximum penalized likelihood . Stat. Med. , 17 : 407 – 429 .
- in press .
- Dmitrienko , A. and Smith , B. 2002 . Analysis of QT interval in clinical trials . Drug Inf. J. , 36 : 269 – 279 .
- Ducharme , G. R. , Gannoun , A. , Guertin , M. C. and Jéquier , J. C. 1995 . Reference values obtained by kernel-based estimation of quantile regressions . Biometrics , 51 : 1105 – 1116 .
- Fan , J. , Hu , T. C. and Truong , Y. K. 1994 . Robust nonparametric function estimation . Scand. J. Stat. , 21 : 433 – 446 .
- Green , P. J. 1984 . Iteratively reweighted least squares for maximum likelihood estimation, and some robust and resistant alternatives (with discussion) . J. R. Stat. Soc. Ser. B , 46 : 149 – 192 .
- Härdle , W. 1991 . Smoothing Techniques New York : Springer-Verlag .
- in press .
- Holland , P. W. and Welsch , R. E. 1977 . Robust regression using iteratively reweighted least-squares . Commun. Stat. Ser. A , 6 : 813 – 828 .
- Koenker , R. and Bassett , G. 1978 . Regression quantiles . Econometrica , 46 : 33 – 50 .
- Koenker , R. , Ng , P. and Portnoy , S. 1994 . Quantile smoothing splines . Biometrika , 81 : 673 – 680 .
- Mallows , C. L. 1973 . Some comments on C p . Technometrics , 15 : 661 – 675 .
- Monahan , J. F. 2001 . Numerical Methods of Statistics Cambridge : Cambridge University Press .
- Nurnberger , G. 1989 . Approximation by Spline Functions Berlin : Springer-Verlag .
- Rautaharju , P. M. , Zhou , S. H. , Wong , S. , Calhoun , H. P. , Berenson , G. S. , Prineas , R. and Davignon , A. 1992 . Sex differences in the evolution of the electrocardiocardiographic QT interval with age . Can. J. Cardiol. , 8 : 690 – 695 .
- Ronchetti , E. and Staudte , R. G. 1994 . A robust version of Mallows' C p . J. Am. Stat. Assoc. , 89 : 550 – 559 .
- Rossiter , J. E. 1991 . Calculating centile curves using kernel density estimation methods with application to infant kidney lengths . Stat. Med. , 10 : 1693 – 1701 .
- Ruppert , D. and Wand , M. P. 1994 . Multivariate locally weighted least squares regression . Ann. Stat. , 22 : 1346 – 1370 .
- Ruppert , D. , Sheather , S. J. and Wand , M. P. 1995 . An effective bandwidth selector for local least squares regression . J. Am. Stat. Assoc. , 90 : 1257 – 1270 .
- Solberg , H. E. 1987 . International federation of clinical chemistry: approved recommendations on the theory of reference values . J. Clin. Chem. Clin. Biochem. , 25 : 337 – 342 .
- Sommer , S. and Huggins , R. M. 1996 . Variables selection using the Wald test and a robust C p . Appl. Stat. , 45 : 15 – 29 .
- Tango , T. 1998 . Estimation of age-specific reference ranges via smoother AVAS . Stat. Med. , 17 : 1231 – 1243 .
- Wright , E. M. and Royston , P. 1997 . Simplified estimation of age-specific reference intervals for skewed data . Stat. Med. , 16 : 2785 – 2803 .
- Wright , E. M. and Royston , P. 1998 . A method for estimating age-specific reference intervals (‘normal ranges’) based on fractional polynomials and exponential transformation . J. R. Stat. Soc. Ser. A , 161 : 79 – 101 .
- Yu , K. and Jones , M. C. 1997 . A comparison of local constant and local linear regression quantile estimators . Comput. Stat. Data Anal. , 25 : 159 – 166 .
- Yu , K. and Jones , M. C. 1998 . Local linear quantile regression . J. Am. Stat. Assoc. , 93 : 228 – 237 .