title: [A photographic scale for evaluating facial pores and analysis of factors associated with pore widening in Chengdu].
abstract: OBJECTIVE
  To develop a photographic scale for grading widening of pores, and to identify the factors associated with pore widening.
  
  
  METHODS
  People with widened pores were recruited, with photographs taken on their nasal tips, nasal alas and cheeks. A questionnaire survey was undertaken by dermatologists to assess the severity of pore widening. A Cumulative Logit Model was established to identify factors that were associated with pore widening.
  
  
  RESULTS
  A total of 115 people participated in the study and 562 photographs were taken. The photographic scale was highly consistent with the clinical judgment. Another 1011 residents aged from 18 to 70 years old in Chengdu were surveyed. The logit model revealed that facial pore widening were associated with gender, age, oily skin, sun protection and anti-aging cosmetic.
  
  
  CONCLUSIONS
  The photographic scale is reliable and easy to use. Gender, age and oily skin are risk factors, and sun protection and anti-aging cosmetic are protective factors with related to pore widening.
authors.affiliation: Department of Dermatovenereology, West China Hospital, Sichuan University, Chengdu 610041, China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Wang
authors.forename: Cheng-xia
authors.initials: CX
authors.lastname: Zhou
authors.forename: Hui-min
authors.initials: HM
authors.lastname: Meng
authors.forename: Xi
authors.initials: X
authors.lastname: Wang
authors.forename: Li
authors.initials: L
authors.lastname: Li
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D005145:Face; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010780:Photogrammetry / Q000295:instrumentation / Q000379:methods*; D010781:Photography / Q000379:methods*; D012867:Skin / Q000033:anatomy & histology* / Q000378:metabolism; D011795:Surveys and Questionnaires; D055815:Young Adult