title: Association of smoking with intraocular pressure in middle-aged and older Japanese residents.
abstract: OBJECTIVE
  To clarify whether smoking was associated with elevated intraocular pressure (IOP) and to evaluate the interrelationship among IOP, blood viscosity, and smoking.
  
  
  METHODS
  This cross-sectional study analyzed health examination data obtained between 2001 and 2004 from 1113 individuals (829 men and 284 women), ranging in age from 28 to 79 years, who had not undergone any ocular surgery or medical treatment for hypertension, ocular hypertension, and glaucoma.
  
  
  RESULTS
  Multiple-regression analysis showed that systolic blood pressure (SBP), diastolic blood pressure (DBP), body mass index (BMI), and number of cigarettes smoked per day had a significantly positive association with IOP in men (P < 0.05). In women also, SBP, DBP, and BMI were positively related to IOP (P < 0.05). On the contrary, age had a significant negative association with IOP in both sexes (P < 0.01). Analysis of covariance and multiple logistic regression analyses showed that the adjusted mean IOP and the multivariate odds ratios for IOP increased with increasing cigarette consumption in men (P for trend = 0.01 and 0.06, respectively). Analysis of covariance found that smoking was significantly associated with both high IOP and high hematocrit in men (P for trend <0.05); however, the adjusted mean IOP values were higher in smokers than in nonsmokers, regardless of the hematocrit level.
  
  
  CONCLUSIONS
  The results of this study suggested that the IOP level may be substantially affected by smoking habit in middle-aged and older Japanese men.
authors: Department of Public Health, Kyorin University School of Medicine, 6-20-2 Shinkawa, Mitaka-shi, Tokyo, 181-8611, Japan, yohhy@ks.kyorin-u.ac.jp.
authors: Masao
authors: M
authors: Yoshida
authors: Shinichiro
authors: S
authors: Take
authors: Mamoru
authors: M
authors: Ishikawa
authors: Akatsuki
authors: A
authors: Kokaze
authors: Kanae
authors: K
authors: Karita
authors: Matsuko
authors: M
authors: Harada
authors: Hideki
authors: H
authors: Ohno
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D001794:Blood Pressure; D001809:Blood Viscosity / Q000502:physiology*; D015992:Body Mass Index; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007429:Intraocular Pressure / Q000502:physiology*; D007564:Japan; D008297:Male; D008875:Middle Aged; D012907:Smoking / Q000009:adverse effects*; D014065:Tonometry, Ocular
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