Piecewise linear mixed growth models were used to examine changes in BMI before and after natural menopause, hysterectomy with ovarian conservation and hysterectomy with bilateral oophorectomy.
Using data from the National Longitudinal Survey of Mature Women, the authors use linear mixed (growth curve) models to estimate trajectories of distress for women aged 52 to 81 years (N = 3,182).
A mixed-effects growth model was applied to serial maternal weight data from 13 to 42 weeks of gestation to produce individual weight-for-gestational week curves using xtmixed in Stata 12.0 (StataCorp. 2011. College Station, TX).
To best utilise the longitudinal data, mixed effects growth models were applied to weight and length data collected from 10 days to 15 months of age to produce growth curves for each sex and each ethnic group.
The mixed effects growth models showed that girls were consistently 0.25 kg lighter and 1.35 cm shorter than boys over the age range being studied, and Pakistani infants were consistently 0.24 kg lighter and 0.39 cm shorter than White infants (p-values < 0.001) (data not shown).
Furthermore, on the basis of the experimental data, a mixed-mode crack growth model is proposed in order to evaluate numerically a fatigue crack growth rate, in which the effects of the loading mode and of the residual stresses due to weld are considered.
However, there are more sophisticated methods such as mixed models, latent growth models, and growth mixture models which allow for missing at random (MAR).
This capacity is illustrated using a cohort-based forest growth model developed for mixed species forest.
The analysis of the tumor size data was performed using a repeated measures growth model with PROC MIXED (SAS v.9.1), which treated the within mouse effect of time as a continuous variable and the treatment group as a fixed effect.
An intention-to-treat analysis will be conducted as well, using the mixed model for repeated measures conditional growth model analysis.
