Table 2 Intervention characteristics and salt intake or behaviour assessment

 Ferrara et al. (2012) [36]^a

Clinic group lectures

N

N

✓ (FFQ)

 Cotter et al. (2013) [31]^a

School lectures and workshop

Y

N

= (24 h)

 Veroff et al. (2012) [23]^a

Self-led using materials

N

N

=

 Cappuccio et al. (2006) [33]^a

Community lectures

Y

N

= (24 h)

 Lin et al. (2013) [24], Svetkey (2009) [56]^a

Clinic group lectures

N

Y

= (24 h)

✓ (FFQ)

 Chen et al. (2008) [15]

Workplace lectures

N

N

✓ (Q)

 Kitaoka et al. (2013) [28]

Community lectures

N

N

= (spot)

✓ (FFQ)

✓

 Ireland et al. (2010) [26]^a

Community workshop

Y

N

✓

(24 h)

✓

(24 recall)

 Lu et al. (2015) [17]^a

Community lecture and workshop

N

N

✓

(salt weigh)

 Resnick et al. (2014) [25]

Community lectures

N

Y

✓ (FFQ)

 White et al. (2013) [27]

Community lectures

N

Y

✓ (Q)

 Bogle (2008)

Community workshop

Y

N

✓

 Chen et al. (2013) [16]^a

Community workshop

Y

N

= (24 h)

✓

(salt weigh)

✓

 Fujii et al. (2009) [29]

Computer program

N

Y

✓

 Papadakis et al. (2010) [32]^a

Mass media (province)

Y

Y

✓

 Wyness et al. (2012) [20], Millett et al. (2012) [38], He (2014) [54]

Mass media (national)

Y

N

✓

 Safefood, Amarach (2006)

Mass media (national)

Y

N

✓

 Martins et al. (2009) [30]

Mass media (national)

Y

N

✓

 Zhang et al. (2014) [18]

Campaign and community lectures

N

N

✓

 Khosravi et al. (2012) [24]^a

Mass media and community lectures

N

N

✓(24 h)

 Drummond (2008)

Campaign and community lecture

Y

N

✓

 Surpluss (2008)

Campaign and workplace lecture

Y

N

✓