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Table 1 Availability of information on the methods used in recording ADRs, categorized according to type of ADRs reported by the trial.

From: Reporting of adverse drug reactions in randomised controlled trials – a systematic survey

Types of ADRs No. of trials reporting Specific details given on how rate of reported ADRs were recorded Did not specify methods used in determining the rate of reported ADRs
Detected by 68 37 (55%) 31 (45%)
investigative tests    
Clinical events 95 14 (15%) 81 (85%)
Patient symptoms 104 18 (17%) 86 (83%)