title: [Prevalence and surgical status of cataract among adults aged 50 years or above in rural Jiangsu Province].
abstract: OBJECTIVE
  To survey the prevalence, operative status, surgical coverage rate and social burden rate of cataract blindness among older adults aged 50 years or above in 2 typical counties (district) of Jiangsu Province, China in 2010.
  
  
  METHODS
  Cluster sampling was used in randomly selected 12 867 individuals aged 50 years or above in 58 clusters in Funing County of Northern Jiangsu and Binhu District of Southern Jiangsu. Among them, 12 053 individuals received visual acuity and eye examinations (response rate 93.8%). Lens and cataract operative status were evaluated by slit-lamp biomicroscope. Data bank was established by Epidata3.0 Software. Statistical analyses were performed with Stata/SE Statistical Software, version 10.0. Confidence intervals and P values (significant at P < 0.05) for prevalence of cataract, surgical coverage rate of cataract, social burden rate and surgical outcomes of cataract blindness were calculated with adjustment for clustering effects and stratification associated with the sampling design.
  
  
  RESULTS
  Among 12 503 individuals, there were 2208 cases of cataract with a prevalence of 18.3%. The prevalence of cataract was higher in the aged, female and lower-income persons (P < 0.05). Among 2208 cataract patients, cataract surgery was performed in 263 cases (11.9%). The surgical coverage rate of cataract was 59.7% and the social burden rate of cataract blindness 1.93%. The social burden rate of cataract blindness was higher in the aged persons (P < 0.01). In 357 eyes with cataract surgery, the rate of intraocular lens implantation was 85.7%. At Binhu, 71.0% of eyes with cataract surgery underwent phacoemulsification. At Funing, 73.6% of eyes underwent modern extra-capsular surgery respectively. Post-operative presenting and best corrected visual acuity over 0.7 was 11.2% and 19.6% of operated eyes respectively. The main causes of post-operative eyes with worse visual acuity (< 0.3) were post-capsular opacity and retinal disorders.
  
  
  CONCLUSIONS
  Cataract is the most common and important eye disease that may lead into blindness and severe visual impairment among older adults aged 50 years or above. The coverage rate of cataract surgery is higher in Jiangsu province than in other provinces. The visual outcomes of surgery is less than ideal. An important task in blindness prevention of Jiangsu province still is the elimination of cataract blindness and the improvement of visual outcomes for cataract surgery in the future.
authors: Department of Ophthalmology, Affiliated Hospital of Nantong University, Nantong, China. guanhjeye@126.com
authors: Huai-jin
authors: HJ
authors: Guan
authors: Yong
authors: Y
authors: Yao
authors: Cong-kai
authors: CK
authors: Liang
authors: Rong-rong
authors: RR
authors: Zhu
authors: Bi-hong
authors: BH
authors: Liu
authors: Ying-xiang
authors: YX
authors: Qi
authors: Dong-hong
authors: DH
authors: Fu
authors: Jun-fang
authors: JF
authors: Zhang
authors: Li
authors: L
authors: Yin
authors: Jian
authors: J
authors: Shi
authors: Mei
authors: M
authors: Yang
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002386:Cataract / Q000000981:diagnostic imaging / Q000453:epidemiology*; D002387:Cataract Extraction / Q000706:statistics & numerical data*; D002681:China / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015995:Prevalence; D012424:Rural Population; D014463:Ultrasonography