Ralph Kent
Biographic Data
| ID | 5204693 |
|---|---|
| NAME | Ralph Kent |
| GIVEN NAMES | Ralph |
| FAMILY NAME | Kent |
| SIGNATURE | KENT R |
| AFFILIATIONS | Novant Health Forsyth Medical Center |
| VERIFIED | No |
| TOTAL WORKS | 4 |
| TOTAL CITATIONS | 7 |
| AUTHOR COUNT | 4 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1978 |
| LATEST PUBLICATION YEAR | 1983 |
| H-INDEX | 2 |
Longitudinal principal components and non-linear regression models of early childhood growth
The Jenss curve is a non-linear regression model which describes quite well the longitudinal length or weight measurements of an individual child from three months to six years. It is contrasted with modelling growth by longitudinal principal components analysis, an approach developed by Kent which is not restricted to any particular curve type or age range, and which can be thought of as providing the best fit among linear models having kappa pa…
Longitudinal trends in subcutaneous fat thickness during adolescence
Longitudinal principal components (LPC) analysis is used to summarize adolescent trends in subcutaneous fat thickness at three sites (biceps, suprailiac, and abdominal). For each site, component 1 (C1) represents fatness level, and component 2 (C2) represents an increase followed by a decrease (fat wave) in fatness. Components 3–5 (retained for girls only) represent more complicated patterns of change (multiple increases and decreases). Correlati…
A step function model using tooth counts to assess the developmental timing of the dentition
Step functions representing median attainment ages of successive counts on numbers of permanent teeth present in the mouth were obtained separately for 12 early-emerging teeth (I1, I2 and M1) and for 16 late-emerging teeth (C, Pm1, Pm2, and M2). Displacement of each step function to best fit of individual tooth counts defined the variation in dental maturation for early teeth and for late teeth. Moreover, differences in the displacements of the t…
Associations in emergence age among permanent teeth
Associations in the timing of emergence among the permanent teeth of Boston children were obtained from a mixed longitudinal growth study of 414 Caucasian twin pairs examined annually. Correlations were estimated by the method of maximum likelihood for corresponding left‐right teeth, upper‐lower teeth, and all paired combinations from central incisor to second molar in a jaw quadrant of each sex. Strong positive correlations in emergence timing p…
Longitudinal trends in subcutaneous fat thickness during adolescence
Longitudinal principal components (LPC) analysis is used to summarize adolescent trends in subcutaneous fat thickness at three sites (biceps, suprailiac, and abdominal). For each site, component 1 (C1) represents fatness level, and component 2 (C2) represents an increase followed by a decrease (fat wave) in fatness. Components 3–5 (retained for girls only) represent more complicated patterns of change (multiple increases and decreases). Correlati…
Associations in emergence age among permanent teeth
Associations in the timing of emergence among the permanent teeth of Boston children were obtained from a mixed longitudinal growth study of 414 Caucasian twin pairs examined annually. Correlations were estimated by the method of maximum likelihood for corresponding left‐right teeth, upper‐lower teeth, and all paired combinations from central incisor to second molar in a jaw quadrant of each sex. Strong positive correlations in emergence timing p…
A step function model using tooth counts to assess the developmental timing of the dentition
Step functions representing median attainment ages of successive counts on numbers of permanent teeth present in the mouth were obtained separately for 12 early-emerging teeth (I1, I2 and M1) and for 16 late-emerging teeth (C, Pm1, Pm2, and M2). Displacement of each step function to best fit of individual tooth counts defined the variation in dental maturation for early teeth and for late teeth. Moreover, differences in the displacements of the t…
Associations in emergence age among permanent teeth
Associations in the timing of emergence among the permanent teeth of Boston children were obtained from a mixed longitudinal growth study of 414 Caucasian twin pairs examined annually. Correlations were estimated by the method of maximum likelihood for corresponding left‐right teeth, upper‐lower teeth, and all paired combinations from central incisor to second molar in a jaw quadrant of each sex. Strong positive correlations in emergence timing p…
Longitudinal principal components and non-linear regression models of early childhood growth
The Jenss curve is a non-linear regression model which describes quite well the longitudinal length or weight measurements of an individual child from three months to six years. It is contrasted with modelling growth by longitudinal principal components analysis, an approach developed by Kent which is not restricted to any particular curve type or age range, and which can be thought of as providing the best fit among linear models having kappa pa…
Longitudinal trends in subcutaneous fat thickness during adolescence
Longitudinal principal components (LPC) analysis is used to summarize adolescent trends in subcutaneous fat thickness at three sites (biceps, suprailiac, and abdominal). For each site, component 1 (C1) represents fatness level, and component 2 (C2) represents an increase followed by a decrease (fat wave) in fatness. Components 3–5 (retained for girls only) represent more complicated patterns of change (multiple increases and decreases). Correlati…
Medicine (3 works) · dental development and anomalies (2 works) · Dentistry (2 works) · Dentition (2 works) · Forensic Anthropology and Bioarchaeology Studies (2 works) · Longitudinal study (2 works) · Mathematics (2 works) · Molar (2 works) · Orthodontics (2 works) · Principal component analysis (2 works)