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J Cataract Refract Surg. 2011 Oct;37(10):1762-7. doi: 10.1016/j.jcrs.2011.05.022. Epub 2011 Aug 6.

Decreasing rate of capsule complications in cataract surgery: eight-year study of incidence, risk factors, and data validity by the Swedish National Cataract Register.

Author information

1
EyeNet Sweden, Blekinge Hospital, Karlskrona, Sweden. mats.lundstrom@ltblekinge.se

Abstract

PURPOSE:

To define the incidence of capsule complication and its risk factors in Sweden over an 8-year period.

SETTING:

Fifty-two ophthalmic surgery units in Sweden.

DESIGN:

Database study.

METHODS:

Data were collected prospectively in the Swedish National Cataract Register (NCR) from 2002 through 2009. The NCR contains 97.3% of the total number of cataract extractions in Sweden over the 8-year study period. One mandatory variable in the register is capsule complications during surgery. As a means to validate the accuracy of register data on capsule complications, a randomly selected sample of 2400 registrations was compared with corresponding medical records.

RESULTS:

The analyses were based on 602,553 cataract extractions reported to the NCR. A capsule complication was reported in 12,574 cataract extractions, corresponding to a frequency of 2.09%. The incidence of this complication consistently decreased each year from 2002 to 2006, after which it stabilized. Poor corrected distance visual acuity in the surgical eye (≤ 0.1), the occurrence of glaucoma, diabetic retinopathy, and age were among the parameters significantly related to a capsule complication. Some of these parameters also decreased over time. However, even after adjusting for this, there was an obvious decrease in capsule complications over time. The validity test showed a certain underreporting of capsule complications to the registry, but it was not significant and did not change over time.

CONCLUSION:

The incidence of capsule complications decreased over time. This may be partly the result of fewer risk factors and of better surgical quality.

FINANCIAL DISCLOSURE:

No author has a financial or proprietary interest in any material or method mentioned.

PMID:
21820852
DOI:
10.1016/j.jcrs.2011.05.022
[Indexed for MEDLINE]
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