For this review, 1184 abstracts of possible relevant articles were identified through literature searches (e.g., MEDLINE, Cochrane), reference lists and grey literature. An additional 321 articles were identified from the previous report. After reviewing abstracts, 491 full-text articles were identified for relevance to the key questions. Of these, 273 were included in the results of the review while 218 were excluded. For example, the population differed, a drug was excluded, or the outcomes were outside the scope of the review. The number of articles included per Key Questions (KQ) is as follows: KQ 1, 213; 2, 52; 3, 4l; and 4, 19 total articles.

Figure 2Study flow diagram

From: Results

Cover of Analgesics for Osteoarthritis
Analgesics for Osteoarthritis: An Update of the 2006 Comparative Effectiveness Review [Internet].
Comparative Effectiveness Reviews, No. 38.
Chou R, McDonagh MS, Nakamoto E, et al.
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