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Table 3 Quality of bias assessment of the included studies according to the Cochrane guidelines

From: Comparison of the effects of fibrates versus statins on plasma lipoprotein(a) concentrations: a systematic review and meta-analysis of head-to-head randomized controlled trials

Study Random sequence generation Allocation concealment Selective reporting Other bias Blinding of participants and personnel Blinding of outcome assessment Incomplete outcome data
Athyros et al. (2002) [52] L U L L H U L
Bredie et al. (1996) [55] U U L L U U L
Hansen et al. (1994) [60] U U L L H U L
Perez-Jimenez et al. (1995) [61] U U L U H U L
Melenovsky et al. (2002) [51] H U L U H U L
Ohrvall et al. (1995) [54] U U L L U U U
Ramires et al. (1995) [62] U U L H H U U
Bairaktari et al. (1999) [50] H U L U U U L
Davidson et al. (2009) [53] L L L L L L L
Greten et al. (1994) [64] U U L U U U L
Kehely et al. (1995) [56] U U L L U U L
May et al. (2008) [57] L U L U L U U
Ramires et al. (1997) [63] U U L U U U L
Saougos et al. (2007) [65] H U L U U U L
Vigna et al. (1999) [58] U U L U U U L
de Lorgeril et al. (1999) [59] U U U U U U U
  1. L low risk of bias, H high risk of bias, U unclear risk of bias