The time periods in chronological order (most recent time period first) are:

• Most recent quarter
• One quarter ago
• Two quarters ago
• Three quarters ago
• Four quarters ago

In addition, the signal summary and drug overview tables maintain information for each product’s alerts that are appropriate to the review period assigned to the product at the time of refresh. When review periods are not enabled, it is assumed that the single supported review period is 3-Months. The review periods are:

• 3-Months
• 6-Months
• 9-Months
• 12-Months

Signal history also contains the following periods:

• One year ago (replacing Four quarters ago)
• Two years ago
• Three years ago
• Four years ago
• Five years ago
• Six years ago