Negative pressure wound therapy: Potential publication bias caused by lack of access to unpublished study results data

Table 6 Sources of conference abstracts and unpublished study information on 28 RCTs: manufacturers, authors, congress proceedings, and authorities

No	Abstracts or other sources	Manufacturers		Authors*	Congress proceedings*		Authorities*
		Kinetic Concepts, Inc.	Blue Sky Medical		WUWHS 2004 [45]	Others	Experts 2003^†	Others
1	Vuerstaek [74]	+	-	-	+	-	-	-
2	No abstract^‡	-	-	-	-	-	-	-
3	Obdeijn [75]	+	-	-	+	-	+	-
4	Payne [76]	+	-	+	+	-	-	-
5	Moues [77]	+	-	-	+	-	+	-
6	Heath [78]	+	-	+	-	-	-	-
7	No abstract^§	+	-	-	-	-	-	-
8	No abstract^\|\|	+	-	-	-	-	-	-
9	Joseph [79]	+	-	-	-	-	+	-
10	Adams [26]	-	-	-	-	-	-	-
11	Fryer [27]	-	-	-	-	-	-	-
12	McCarthy [28]	-	-	+	-	-	-	-
13	Walker [29]	-	-	-	-	-	-	-
14	No abstract^¶	+	-	-	-	-	-	-
15	No abstract^#	+	-	-	-	-	-	-
16	Bayer [31]	+	-	-	+	-	-	-
17	Greer [33]	+	-	-	-	-	+	-
18	Orgill [34]	+	-	-	+	-	-	-
19	Stannard [35]	+	-	-	+	-	-	-
20	Armstrong [36]	+	-	+	+	-	-	-
21	McCarthy [37]	-	-	-	-	-	-	-
22	Molnar [38]	+	-	-	+	-	-	-
23	Niezgoda [39]	+	-	-	+	+	-	-
24	Stannard [40]	+	-	-	+	-	-	-
25	Stannard [41]	+	-	-	+	-	-	-
26	Foo [42]	-	-	-	+	-	-	-
27	Gupta [43]	-	-	-	-	+	-	-
28	Lantis [44]	-	-	-	+	-	+	-
		19	0	4	14	2	5	0

* See Table 1.
† Citations submitted by experts to the German Federal Joint Committee.
‡ No preceding abstract was identified concerning the full-text article by Llanos 2006 (Tables 7–9).
§No preceding abstract was identified, but information by the manufacturer KCI was provided concerning the full-text article by Eginton 2003 (Tables 7–9).
|| No preceding abstract was identified, but information by the manufacturer KCI was provided concerning the full-text article by Wanner 2003 (Tables 7–9).
¶No preceding abstract was identified, but information by the manufacturer KCI was provided concerning the full-text article by Ford 2002 (Tables 7–9).
# No preceding abstract was identified, but information by the manufacturer KCI was provided concerning this discontinued study KCI ID VAC 2001–02.
RCT: randomised controlled trial; WUWHS: World Union of Wound Healing Societies

ISSN: 1471-2288