title: Predictors of facial palsy after surgery for benign parotid disease: multivariate analysis of 626 operations.
abstract: BACKGROUND
  The objective was to identify the risk factors for, and incidence of, facial palsy following conservative parotidectomy.
  
  
  METHODS
  Conservative parotidectomies for benign diseases (N = 626) were studied retrospectively. The risk factors for postoperative facial palsy were determined by univariate and multivariate analyses of variables related to patient demographics, comorbid illnesses, and characteristics of the operation.
  
  
  RESULTS
  The rate of transient facial palsies was 23.16% following parotidectomy. Significant risk factors for transient facial palsy were diabetic mellitus (odds ratio [OR] 1.727 [95% CI: 1.062-2.810]) and extended surgery (OR 3.049 [95% CI: 2.058-4.515]). Only the type of surgery was found to have a statistically significant causal relation with permanent facial palsy (p = .017).
  
  
  CONCLUSIONS
  Comorbid diabetes, and more extensive as opposed to partial superficial parotidectomy, may be associated with transient facial palsy following operation for benign parotid disease. The incidence of permanent facial palsy may be higher when a more extensive parotidectomy is performed.
authors.affiliation: Department of Otolaryngology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
authors.forename: Xiandao
authors.initials: X
authors.lastname: Yuan
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Gao
authors.forename: Hong
authors.initials: H
authors.lastname: Jiang
authors.forename: Hua
authors.initials: H
authors.lastname: Yang
authors.forename: Wei
authors.initials: W
authors.lastname: Lv
authors.forename: Zhen
authors.initials: Z
authors.lastname: Wang
authors.forename: Yanyan
authors.initials: Y
authors.lastname: Niu
authors.forename: Guodong
authors.initials: G
authors.lastname: Feng
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D016009:Chi-Square Distribution; D002648:Child; D015331:Cohort Studies; D005158:Facial Paralysis / Q000453:epidemiology* / Q000209:etiology*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D013517:Otorhinolaryngologic Surgical Procedures / Q000009:adverse effects* / Q000379:methods; D010305:Parotid Diseases / Q000473:pathology* / Q000601:surgery*; D011183:Postoperative Complications / Q000175:diagnosis / Q000453:epidemiology; D011237:Predictive Value of Tests; D011336:Probability; D012189:Retrospective Studies; D018570:Risk Assessment; D017678:Sex Distribution; D018709:Statistics, Nonparametric; D016896:Treatment Outcome; D055815:Young Adult