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Table 4 Search results for randomised controlled trials on negative pressure wound therapy* (Status: December 2006)

From: Negative pressure wound therapy: Potential publication bias caused by lack of access to unpublished study results data

Study status No. Abstract Information source for abstract Sponsor (ID) Reply to inquiry to sponsor or author Patients planned Patients analysed§ Results data available Full-text publication available||
Completed          
  1 Vuerstaek [74] WUWHS 2004 KCI (VAC VLU) KCI - 60 Yes Vuerstaek 2006 [23]
  2 No abstract - Unclear - - 60 Yes Llanos 2006 [25]
  3 Obdeijn [75] WUWHS 2004 KCI (No ID) KCI - 65 Yes Braakenburg 2006 [21]
  4 Payne [76] WUWHS 2004 KCI (VAC 2001–07) KCI; author - 162 Yes# Armstrong 2005 [22]
  5 Moues [77] WUWHS 2004 KCI (PMID 14974959) KCI - 54 Yes# Moues 2004 [20]
  6 Heath [78] The Cochrane Library KCI (PMID 15468399) KCI; author - 20 Yes# Moisidis 2004 [18]
  7 No abstract - KCI (PMID 14534844) KCI - 6 Yes# Eginton 2003 [17]
  8 No abstract - KCI (PMID 12625392) KCI - 22 Yes# Wanner 2003 [24]
  9 Joseph [79] The Cochrane Library KCI (No ID) KCI - 24 Yes# Joseph 2000 [19]
  10 Adams [26] NRR Unclear No reply Unclear Unclear No No
  11 Fryer [27] ClinicalTrials.gov Unclear No reply 120 Unclear No No
  12 McCarthy [28] NRR Unclear Author ** 160 Unclear No No
  13 Walker [29] NRR Unclear No reply 48 Unclear No No
Subtotal 13      328 473   
Discontinued          
  14 No abstract - KCI (PMID 12142596) KCI - 22 Yes# Interim results: Ford 2002 [30]
  15 No abstract KCI KCI (VAC 2001–02) KCI 214 - No No
  16 Bayer [31] WUWHS 2004 KCI (VAC 2002–09) KCI 116 - No No
  17 Greer [33] The Cochrane Library KCI (No ID) KCI †† 80 - No No
  18 Orgill [34] WUWHS 2004 KCI (VAC 2002–10) KCI 116 - No No
  19 Stannard [35] WUWHS 2004 KCI (VAC 2001–06) KCI; author 300 - No No
Subtotal 6      826 22   
Ongoing          
  20 Armstrong [36] WUWHS 2004 KCI (VAC 2001–08) KCI; author 206 - - No
  21 McCarthy [37] ClinicalTrials.gov Unclear No reply 30 - - No
  22 Molnar [38] WUWHS 2004 KCI (VAC 2001–00) KCI 50 - - No
  23 Niezgoda [39] WUWHS 2004 KCI (VAC 2001–01) KCI 214 - - No
  24 Stannard [40] WUWHS 2004 KCI (VAC 2001–04) KCI; author 258 (44) Yes Interim results: Stannard 2006 [80]
  25 Stannard [41] WUWHS 2004 KCI (VAC 2001–05) KCI; author 348 (44) Yes Interim results: Stannard 2006 [80]
Subtotal 6      1106 (88)   
Unclear          
  26 Foo [42] WUWHS 2004 Unclear No reply Unclear - No No
  27 Gupta [43] WHS 2001 Unclear No reply Unclear - No No
  28 Lantis [44] WUWHS 2004 Unclear No reply Unclear - No No
Subtotal 3      Unclear    
Total (all trials) 28      2260 495   
  1. * Not classified by IQWiG as an RCT on NPWT (in contrast to other systematic reviews): McCallon 2000 [69]; Genecov 1998 [70]; Buttenschoen 2001 [81]; Jeschke 2004 [82].
  2. † The PubMed ID number, when available, is used by KCI as the study ID for published RCTs.
  3. ‡ Number of patients planned in unpublished and ongoing studies as stated in abstracts and personal communications.
  4. § Number of patients analysed in published studies.
  5. || Full-text publication of interim or final results (any study status).
  6. ¶ Results considered in the IQWiG rapid report.
  7. # Results considered in the IQWiG systematic review.
  8. ** The author replied to IQWiG's first request for information and stated that the trial was ongoing. However, according to information provided by the NRR (accessed on 04 Feb 2007), this trial has since been completed. A second query was not answered.
  9. †† According to KCI, 16 patients were enrolled in this trial.
  10. ID: Identification code; NRR: National Research Register; PMID: PubMed Identification Code; VLU: venous leg ulcer; WHS: Wound Healing Society; WUWHS: World Union of Wound Healing Societies.