Applicability of the Ricketts' posteroanterior cephalometry for sex determination using logistic regression analysis in Hispano American Peruvians.

Background: The Ricketts' posteroanterior (PA) cephalometry seems to be the most widely used and it has not been tested by multivariate statistics for sex determination.

Objective: The objective was to determine the applicability of Ricketts' PA cephalometry for sex determination using the logistic regression analysis.

Materials And Methods: The logistic models were estimated at distinct age cutoffs (all ages, 11 years, 13 years, and 15 years) in a database from 1,296 Hispano American Peruvians between 5 years and 44 years of age.

Cephalometric norms from posteroanterior Ricketts' cephalograms from Hispanic Americans Peruvian non adult patients.

Aim: The purpose of the present study was to describe the posteroanterior cephalometric norm values from Hispanic Americans Peruvian non adults patients between years 2009 to 2010, identify possible differences between sexes and compare our results with similar studies in the literature.

Material And Methods: Data from posteroanterior cephalograms from 318 patients (177 females and 141 males) between 9 and 18 years old were collected from our database; mean and standard deviation were calculated for each gender and age group.

Results: Independent samples T-test found statistically significant differences between males and females results in the intermolar width, right molar to maxillae distance, nasal width, nasal height, maxillary width, mandibular width and facial width.