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Table 1 Results of the 19 contracting companies that indicated that they perform network meta-analysis

From: Network meta-analyses performed by contracting companies and commissioned by industry

  Company Start date of first NMA NMAs completed NMAs published NMA conducted/year NMA published/year Ratio published/conducted
1 Mapi Group (incl. Health Technology Analysts and Optum) Nov-05 88 33 9.5 3.6 0.38
2 Abacus International/Decision Research Group Jun-07 54 10 7.0 1.3 0.19
3 Redwood Outcomes (now part of Precision Health Economics) Sept-13 51 5 36 3.5 0.10
4 Evidera/UBCc Nov-08 50 3 8.0 0.48 0.06
5 Kleijnen Systematic Reviews Ltdc Jan-08 20 14 2.8 2.0 0.70
6 Amaris Jan-12 15 1 4.9 0.32 0.07
7 Symmetron Ltd Nov-08 13 2 2.1 0.32 0.15
8 RTI Health Solutions Jun-00 12 13 0.82 0.89 1.08
9 Medignition Inc. Aug-08 6 6 0.92 0.92 1.00
10 Augmentium Pharma Consulting Jan-05 5 4 0.50 0.40 0.80
11 AHEAD Jun-10 2 2 0.43 0.43 1.00
12 Xintera Consulting Jan-09 2 2 0.33 0.33 1.00
13 CEMKA-EVAL May-12 2 0 0.73 0.0 0.0
14 McMDC Ltd Sep-09 2 1 0.37 0.18 0.50
15 Pharmacoeconomics and Outcomes Research Iberia Jan-10 2 1 0.39 0.20 0.50
16 BeSyRe Bekkering Systematic Reviews May-10 1 1 0.21 0.21 1.00
17 David Hoaglin (consulting statistician) Jan-09 1 1 0.16 0.16 1.00
18 Company 1c NP NP NP NP NP 0.04
19 Company 2c NP NP NPa NP NP 0.08
  Total 476b 106b 6.6 1.5 0.22
  1. Companies are sorted based on the number of network meta-analyses (NMA) conducted
  2. NP not presented due to confidentiality
  3. aSince no list of references was available from Company 2, we used the number of papers identified by our literature search
  4. bMeta-analyses conducted or published by more than one contracting company are double-counted, but these are uncommon. The sum of 106 for published network meta-analyses corresponds to 102 papers, because four meta-analyses were co-authored by two contracting companies. The exact level of redundancy for conducted meta-analyses is not correct, but is likely to be similarly low
  5. cThese companies gave an approximation for the number of conducted network meta-analyses. For calculations the approximation was considered as the actual number of network meta-analyses