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Table 2 Jadad quality scores of the six trials included in the meta-analysis

From: Prophylactic cranial irradiation for patients with small-cell lung cancer: a systematic review of the literature with meta-analysis

  Randomization Concealment of allocation Double blinding Withdrawals and dropouts Total
Gregor 1997 [11] 1 1 0 0 2
Laplanche 1998 [13] 1 1 0 1 3
Cao KJ 2005 [14] 1 1 0 0 2
Slotman 2007 [15] 1 1 0 1 3
Schild 2012 [8] 1 1 0 0 2