title: Offspring sex ratio of Iranian dentists.
abstract: OBJECTIVE
  To assess the impact of occupational factors on the sex ratio of dentists' children.
  
  
  METHODS
  A randomly selected 501 Iranian dentists participated in a telephone interview. The participants were contacted by their mobile number to answer questions about demographic variables (gender, age, marriage status), practice-related variables (year of graduation as general or specialist dentist, years of clinical work, working hours, average number of radiographs taken in a day, and spouse's job), and questions about their children (number, gender and date of birth of each child). Kruskal-Wallis and Chi-square tests served for statistical evaluation.
  
  
  RESULTS
  Of all participating dentists, 71 % were men, about two-thirds were 35- to 50-year olds, and 89 % were married. In total, the dentists had 768 children; about 21 % had no child. Of all the children, 54 % were boys (overall sex ratio = 1.17). The offspring sex ratio was 1.13 among male dentists, 1.50 for female dentists, and 1.44 when both parents were dentists. Higher percentages of boys were prevalent among female dentists, younger dentists, and general dental practitioners (p < 0.008).
  
  
  CONCLUSIONS
  Demographic and practice-related factors showed some impact on proportions of both sexes of dentists' children in this study. However, the result needs evaluation in further studies.
authors.affiliation: Department of Community Oral Health, School of Dentistry, Shahid Beheshti University of Medical Sciences, Daneshjou Blvd., Evin, Postal Code: 1983963113, Tehran, Iran. ha.ghasemi@sbmu.ac.ir.
authors.forename: Hadi
authors.identifier: http://orcid.org/0000-0003-3331-1094
authors.initials: H
authors.lastname: Ghasemi
authors.affiliation: Department of Community Oral Health, School of Dentistry, Shahid Beheshti University of Medical Sciences, Daneshjou Blvd., Evin, Postal Code: 1983963113, Tehran, Iran.
authors.forename: Seyedeh Reihaneh
authors.initials: SR
authors.lastname: Mirdehghan
authors.affiliation: Department of Community Oral Health, School of Dentistry, Shahid Beheshti University of Medical Sciences, Daneshjou Blvd., Evin, Postal Code: 1983963113, Tehran, Iran.
authors.forename: Mahshid
authors.initials: M
authors.lastname: Namdari
authors.affiliation: Dental Research Institute, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Fariborz
authors.initials: F
authors.lastname: Bayat
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D016009:Chi-Square Distribution; D002648:Child; D002675:Child, Preschool; D003815:Dentists / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007492:Iran; D008297:Male; D008875:Middle Aged; D012098:Reproduction; D012744:Sex Ratio; D018709:Statistics, Nonparametric
keywords: Birth outcome; Dentists; Occupational factors; Offspring; Sex ratio