Project | Included studies not retrieved by search of both MEDLINE/EMBASE | Sources of non-retrieved citations as reported in the reviews | Non-retrieved citations identifiable from reference lists of retrieved studies and reviews | Total identifiable from reported searches of MEDLINE, EMBASE, plus reference checking of included studies and reviews | Remaining citations published as abstracts only | “Missing” citationsa |
---|---|---|---|---|---|---|
Holmes (2014) | 14/51 | Reference lists (11), WoS (2), Google (1) | 13 | 50/51 (98 %) | 0 | 1 |
Ward (2013) | 6/32 | Manufacturer (1), NR (5) | 2 | 28/32 (88 %) | 2 | 2 |
Simpson (2013) | 1/44 | NR (1) | 0 | 43/44 (98 %) | 0 | 1 |
Goodacre (2013) | 6/40 | WoS (4), CINAHL (1), personal contact (1) | 5 | 39/40 (98 %) | 0 | 1 |
Stevenson (2012) | 5/17 | WoS (3), Manufacturer (1), BIOSIS previews (1) | 1 | 13/17 (76 %) | 3 | 1 |
Cooper (2011) | 7/45 | WoS (3), BIOSIS previews (2), reference lists (1), PubMed (1) | 0 | 38/45 (84 %) | 5 | 2 |
Sutcliffe (2009) | 1/30 | WoS (1) | 0 | 29/30 (97 %) | 0 | 1 |
Pandor (2004) | 6/15 | Reference lists (4), WoS (1), NR (1) | 3 | 12/15 (80 %) | 2 | 1 |
Kaltenthaler (2004) | 0/28 | None | 0 | 28/28 (100 %) | 0 | 0 |
Total | 46/302 (15 %) | Reference lists (16), WoS (14), NR (7), BIOSIS (3), others (6) | 24/46 (52 %) | 280/302 (93 %) | 12/46 (26 %) | 10/46 (22 %) |