Table 4 Mediation analysis for the association between nutrition and health-related quality of life, mediated by depression

Total effect, c

2.90 (0.35)

2.20, 3.60

2.87 (0.36)

2.16, 3.58

2.29 (0.34)

1.62, 2.97

Direct effect, c’

2.58 (0.37)

1.86, 3.30

2.56 (0.37)

1.83, 3.29

2.14 (0.35)

1.45, 2.84

Indirect effect, ab

0.32 (0.13)

0.12, 0.62

0.31 (0.12)

0.12, 0.60

0.15 (0.09)

0.02, 0.38

Ratio of indirect to total effect mediated, (ab/c)

0.11

0.11

0.06

Ratio of indirect to direct effect, (ab/c’)

0.13

0.12

0.07