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Table 3 Mediation of pictorial health warnings’ effect on calories from SSBs purchased by parents for their children

From: How pictorial warnings change parents’ purchases of sugar-sweetened beverage for their children: mechanisms of impact

  

Warnings on mediator

Mediator on calories

Direct effect

Total effect

Mediated effect

n

a

b

c'

c

a x b (95% CI)

Message reactions

      

Attention to the labels

322

1.48 (1.21, 1.76)

3.86 (-4.16, 11.89)

-36.04 (-59.54, -12.54)

-30.31 (-50.56, -10.05)

5.73 (-5.85, 17.47)

Negative emotional reactions

320

1.87 (1.66, 2.09)

-2.80 (-13.24, 7.63)

-24.44 (-52.68, 3.81)

-29.69 (-50.05, -9.33)

-5.25 (-23.82, 14.49)

Thinking about harms of drinking SSBs

322

2.31 (2.07, 2.55)

-6.90 (-16.07, 2.22)

-14.32 (-43.56, 14.93)

-30.31 (-50.56, -10.06)

-15.99 (-36.93, 4.71)

Attitudes and beliefs

      

Perceived amount of added sugar in SSBs

321

0.10 (-0.06, 0.26)

-8.29 (-22.31, 5.72)

-30.00 (-50.33, -9.67)

-30.82 (-51.11, -10.53)

-0.83 (-3.73, 0.93)

Perceived healthfulness of SSBs for child

321

-0.26 (-0.44, -0.08)

25.48 (13.21, 37.75)

-23.31 (-43.40, -3.23)

-29.99 (-50.30, -9.68)

-6.68 (-13.11, -1.74)

Appeal of SSBs for child

322

-0.08 (-0.30, 0.13)

-1.92 (-12.40, 8.56)

-30.47 (-50.77, -10.17)

-30.31 (-50.56, -10.06)

0.16 (-1.14, 1.96)

Perceived tastiness of SSBs for child

321

-0.17 (-0.37, 0.03)

-2.18 (-13.23, 8.86)

-29.75 (-50.10, -9.40)

-29.38 (-49.62, -9.15)

0.37 (-1.49, 2.83)

Perceived likelihood having health problems

309

0.12 (-0.10, 0.33)

-13.31 (-23.95, -2.68)

-33.81 (-54.20, -13.42)

-35.36 (-55.88, -14.84)

-1.55 (-4.86, 1.57)

Injunctive norms to limit SSBs for child

316

0.39 (0.11, 0.67)

4.42 (-3.65, 12.50)

-34.21 (-54.85, -13.58)

-32.47 (-52.86, -12.08)

1.75 (-1.35, 5.59)

Intentions

      

Anticipated social interactions

322

1.73 (1.45, 2.01)

-1.51 (-9.45, 6.43)

-27.69 (-52.21, -3.19)

-30.31 (-50.56, -10.06)

-2.61 (-16.30, 11.17)

Intentions to serve SSBs to child

320

-0.35 (-0.64, -0.05)

7.69 (0.17, 15.21)

-27.02 (-47.45, -6.58)

-29.69 (-50.05, -9.33)

-2.67 (-7.63, 0.01)

  1. Note. SSB = sugar-sweetened beverages. The a pathways are reported in Table 2. The b pathway represents the coefficient from regressing the outcome on the mediator, controlling for treatment arm. The final column shows mediated effects (a × b). The c pathway represents the coefficient from regressing the outcome on treatment arm; this coefficient may vary due to differing sample sizes. The c' pathway is equiavalent to the indirect effect subtracted from the total effect. Bold indicates statistical significance, p < .05