There is considerable individual variation in the timing, duration, and intensity of growth that occurs in the craniofacial complex during childhood and adolescence. The purpose of this article is to describe the extent of this variation between traits and between individuals within the Fels Longitudinal Study (FLS). Polynomial multilevel models were used to estimate the ages of onset, peak velocity, and cessation of adolescent growth, the time between these ages, the amount of growth between these ages, and peak velocity. This was done at both the group and individual levels for standard cephalometric measurements of the lengths of the mandible, maxilla, and cranial base, the gonial angle, and the saddle angle. Data are from 293 untreated boys and girls age 4–24 years in the FLS. The timing of the adolescent growth spurt was, in general, not significantly different between the mandible and the maxilla, with each having an earlier age of onset, later age of peak velocity, and later age of cessation of growth as compared to the cranial base length. Compared to lengths, angles had in general later ages of onset, peak velocity, and cessation of growth. Accurate characterization of the ontogenetic trajectories of the traits in the craniofacial complex is critical for both clinicians seeking to optimize treatment timing and anatomists interested in examining heterochrony. Anat Rec, 297:1195–1207, 2014.

One in four American adults has a disability. Individuals with disabilities are more likely to have mental health issues and use substances and are less likely to attend substance use rehabilitation compared to individuals without disabilities. However, most research about substance use and substance use rehabilitation does not focus specifically on sensory disabilities. The purpose was to test the association between vision and/or hearing loss, lifetime drug use, and lifetime drug rehabilitation. Data files from National Health and Nutrition Examination Survey cycles (2013-2014, 2015-2016, 2017-2018) were combined. Ordinal logistic regression was used to test the association between vision and hearing loss and lifetime drug use and binary logistic regression to test the association with lifetime rehabilitation among those who had used drugs, adjusting for multiple testing and the complex survey design. There was a significant association between vision and hearing loss status and lifetime drug use (p = .018), but not with lifetime rehabilitation (p = .972). Post-hoc comparisons were not statistically significant. However, individuals with vision loss only and hearing loss only had 36% and 37% greater odds, respectively, of drug use than those without a disability, and those with both vision and hearing loss had 18% greater odds of drug use than those with either alone. Persons with disability were more likely to have used drugs but were not more likely to have gone to drug rehabilitation.