Relationship between Tooth Emergence and Height/Fat Mass Adjusted for Tanner Stage.

Relationships between primary tooth variables (quintiles of ‘number of paired teeth’ at age 15 months and ‘age at first tooth’) and height (cm)/fat mass (kg) at 17 years of age, with or without adjustment for Tanner stage as ascertained at age 13, in 977 males and 1240 females. Analyses with fat mass were additionally adjusted for height and lean mass. In the case of height, β-coefficients represent mean change in height per quintile increase in number of paired teeth/month increase in age at first tooth. Due to the skewed nature of fat mass we used the natural logarithm in analyses. Beta-coefficients were back transformed so that the coefficients represent the ratio of geometric means (RGM) of fat mass per quintile increase in number of paired teeth/month increase in age at first tooth. The basic model was adjusted for age at dxa scan, age (in months) of dentition questionnaire completion, gestational age and stratified by gender. p(int) is the p-value from a gender interaction test. R2 reports the coefficient of determination (variance explained) by the models outlined above.