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Estimation in a growth study with irregular measurement times
Author(s) -
Poortema K.,
Tarnminga R. Y. J.,
Schaafsma W.
Publication year - 1993
Publication title -
statistica neerlandica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 39
eISSN - 1467-9574
pISSN - 0039-0402
DOI - 10.1111/j.1467-9574.1993.tb01409.x
Subject(s) - statistics , feature (linguistics) , division (mathematics) , sample (material) , estimation , missing data , statistical analysis , data mining , computer science , mathematics , engineering , arithmetic , systems engineering , philosophy , linguistics , chemistry , chromatography
Between 1982 and 1988 a growth study was carried out at the Division of Pediatric Oncology of the University Hospital of Groningen. A special feature of the project was that sample sizes are small and that ages at entry may be very different. In addition the intended design was not fully complied with. This paper highlights some aspects of the statistical analysis which is based on (1) reference scores, (2) statistical procedures allowing for an irregular pattern of measurement times caused by missing data and shifted measurement times.