Ocular randomized and quasi-randomized contral trial in ophthalmologic journals

Objective:In order to clarify the actual situations of the randomized control trial(RCT)or quasi-randomized trial(QRT)and prospective clinical experimental researches in the journals of opthalmology,the related materials from 7 major journals of opthalmology from the start publication up to the year of 1999 were hand searched.Method:We handsearching These journals hand searched. and according to the criteria of RCT and QCT were included according to Cochrane Center handsearch standards.Results:Seven Ophthalmologic Journals had 21317 papers,the RCT and QCT 280 papers were included,about 1.31%,A tolal of 7428 papers were in 179 issues of China Ophthalmologic Journal,62 papers could be included,about 0.84%.The RCT and QCT in the year of 60s are rare,after 1970,RCT and CCT increased year by year.Conclusion:As the Evidence-Based Medicine becoming gradually accepted of in clinical ophthalmology,the RCT and CCT would likely to be increased year by year in ophthalmologic journals.