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Table 6 Reporting in guidelines of trials and systematic reviews of salt reduction

From: Methods underpinning national clinical guidelines for hypertension: describing the evidence shortfall

Reference Year CMA 1999 WHO 1999 VHA 1999 SIGN 2001 ESH 2003 ICSI 2003 JNC 2003 SA 2003 BHS 2004 NICE 2004
Randomised Controlled Trials
Silman [35] 1983 Y         SR[36] Y
Fagerberg [37] 1985 SR[38]    SR[38]      SR[38] Y
Chalmers [39] 1986 SR[38] SR[40]   SR[38]      SR[38] Y
Chalmers [41,42] 1989      SR[40]      Y
TOHPI 1992    Y        Y(ex)
Jula [43] 1994 SR[38]    SR[38]      SR[38] Y
Whelton [44] 1998     Y      Y Y(ex)
Appel [45] 2001       Y     Y(ex)
Sacks [46] 2001        Y Y   Y(ex)
Systematic Reviews
Law [47] 1991    Y    Y     Y
Midgely [38] 1996 Y    Y      Y Y
Cutler [40] 1997   Y    Y      Y
Hooper [36] 2002          Y Y
Grade of recommendation
   B   I A - - - - A B[34]
  1. Y Trial cited by guideline
  2. SR Trial included in systematic review cited by guideline
  3. Y(ex) Trial cited by guideline but excluded from meta-analysis