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Table 2 Summary of quality indicators for studies of acetylcysteine for prevention of contrast-induced nephropathy.

From: Acetylcysteine for prevention of contrast-induced nephropathy after intravascular angiography: A systematic review and meta-analysis

First Author Jadad score Inclusion/exclusion criteria specified Randomization process described Use of any blinding Placebo-controlled Reported loss to follow-up Intention-to treat analysis Potential important baseline differences Power calculation
Allaqaband 25 3 yes/no yes yes yes no no no yes
Baker 26 2 yes/yes yes no yes no yes no yes
Briguori 27 1 yes/no yes no no no unclear yes no
Diaz-Sandoval 28 4 yes/yes yes yes no yes unclear yes no
Durham 29 5 yes/yes yes yes yes yes unclear no yes
Efrati 30 4 yes/yes no yes yes yes unclear no no
Fung 31 4 yes/yes yes no no no yes no yes
Goldenberg 32 5 yes/yes yes yes yes no unclear no yes
Kay 33 5 yes/yes yes yes yes yes yes no yes
Kefer 34 4 yes/yes yes yes yes yes unclear yes no
MacNeill 35 4 yes/yes yes no yes no unclear no yes
Oldemeyer 36 4 yes/yes yes yes no yes unclear no no
Shyu 37 3 yes/yes yes yes no yes unclear no no
Vallero 38 2 yes/yes yes no no no unclear yes no
  1. Legend: NR = not recorded or available; Jadad score range 0–5.