Table 3

Estimated reduction in obesity from a 10% tax by age (CI = credible interval)
Age Percentage reduction in obesity (number of people shown in brackets)
Female Male Overall
18-24 2.4% (410) 3.3% (350) 2.9% (790)
25-34 2.2% (850) 2.0% (940) 2.1% (1,790)
35-44 1.6% (730) 1.3% (780) 1.4% (1,510)
45-54 0.8% (440) 0.9% (540) 0.8% (980)
55-64 0.7% (290) 0.8% (360) 0.7% (660)
65-74 0.5% (90) 0.7% (200) 0.6% (290)
75+ 0.5% (60) 0.7% (50) 0.6% (110)
Overall 1.3% (2,920) 1.2% (3,250) 1.3% (6,170)
(95% CI: 1,920 to 3,860) (95% CI: 2,310 to 4,200) (95% CI: 4,240 to 8,060)
Overall (adjusted) 1.3% (5,310) 1.2% (4,600) 1.3% (9,900)
(95% CI: 3,490 to 7,020) (95% CI: 3,260 to 5,920) (95% CI: 6,750 to 12,940)

Estimates are of the reduction in adults with a BMI ≥ 30 kg/m2 and are based on a tax pass on rate of 90%, price elasticity of −0.9. Numbers may not sum due to rounding. Adjusted results are scaled up for under-reporting of obesity; they are derived assuming a baseline prevalence of male obesity of 22% and female obesity of 24% (compared to 16% and 13% respectively in the unadjusted results). Estimates for each age group are weighted for sex; and the overall estimate is weighted for age and sex of the Irish population.

Briggs et al.

Briggs et al. BMC Public Health 2013 13:860   doi:10.1186/1471-2458-13-860

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