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Title

n-3 Fatty Acid Supplementation for the Treatment of Dry Eye Disease.

Authors

Dry Eye Assessment and Management Study Research Group, Asbell PA, Maguire MG, Pistilli M, Ying GS, Szczotka-Flynn LB, Hardten DR, Lin MC, Shtein RM.

Journal

N Engl J Med.

Year

2018

Vol (Issue)

378(18)

Page

1681-90.

doi

10.1056/NEJMoa1709691.

PMID

29652551

Url

http://www.ncbi.nlm.nih.gov/pubmed/29652551

MeSH

Administration, Oral
Adult
Aged
Dietary Supplements*/adverse effects
Docosahexaenoic Acids/adverse effects
Docosahexaenoic Acids/therapeutic use*
Double-Blind Method
Eicosapentaenoic Acid/adverse effects
Eicosapentaenoic Acid/therapeutic use*
Female
Humans
Keratoconjunctivitis Sicca/drug therapy*
Male
Middle Aged
Olive Oil/adverse effects
Olive Oil/therapeutic use
Severity of Illness Index
Treatment Failure

Keywords

한글 키워드

KMCRIC
Summary & Commentary

KMCRIC 비평 보기 +

Korean Study

Abstract

BACKGROUND:
Dry eye disease is a common chronic condition that is characterized by ocular discomfort and visual disturbances that decrease quality of life. Many clinicians recommend the use of supplements of n-3 fatty acids (often called omega-3 fatty acids) to relieve symptoms.

METHODS:
In a multicenter, double-blind clinical trial, we randomly assigned patients with moderate-to-severe dry eye disease to receive a daily oral dose of 3000 mg of fish-derived n-3 eicosapentaenoic and docosahexaenoic acids (active supplement group) or an olive oil placebo (placebo group). The primary outcome was the mean change from baseline in the score on the Ocular Surface Disease Index (OSDI; scores range from 0 to 100, with higher scores indicating greater symptom severity), which was based on the mean of scores obtained at 6 and 12 months. Secondary outcomes included mean changes per eye in the conjunctival staining score (ranging from 0 to 6) and the corneal staining score (ranging from 0 to 15), with higher scores indicating more severe damage to the ocular surface, as well as mean changes in the tear break-up time (seconds between a blink and gaps in the tear film) and the result on Schirmer's test (length of wetting of paper strips placed on the lower eyelid), with lower values indicating more severe signs.

RESULTS:
A total of 349 patients were assigned to the active supplement group and 186 to the placebo group; the primary analysis included 329 and 170 patients, respectively. The mean change in the OSDI score was not significantly different between the active supplement group and the placebo group (-13.9 points and -12.5 points, respectively; mean difference in change after imputation of missing data, -1.9 points; 95% confidence interval [CI], -5.0 to 1.1; P=0.21). This result was consistent across prespecified subgroups. There were no significant differences between the active supplement group and the placebo group in mean changes from baseline in the conjunctival staining score (mean difference in change, 0.0 points; 95% CI, -0.2 to 0.1), corneal staining score (0.1 point; 95% CI, -0.2 to 0.4), tear break-up time (0.2 seconds; 95% CI, -0.1 to 0.5), and result on Schirmer's test (0.0 mm; 95% CI, -0.8 to 0.9). At 12 months, the rate of adherence to treatment in the active supplement group was 85.2%, according to the level of n-3 fatty acids in red cells. Rates of adverse events were similar in the two trial groups.

CONCLUSIONS:
Among patients with dry eye disease, those who were randomly assigned to receive supplements containing 3000 mg of n-3 fatty acids for 12 months did not have significantly better outcomes than those who were assigned to receive placebo.

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