Table 2 Absolute and relative effect of the 2017 Catalonian SSB tax on price and purchases of sugar-sweetened beverages, non-sugar-sweetened beverages and bottled water after 1, 2, 3 and 3.5 years

SSBs

Mean price (€/L)

1

1.06

0.99 (0.96 to 1.01)

0.08 (0.06 to 0.10)

7.82% (5.78 to 10.14%)

< 0.01

2

1.09

0.99 (0.97 to 1.01)

0.10 (0.08 to 0.12)

10.12% (8.27 to 12.38%)

< 0.01

3

1.1

0.99 (0.97 to 1.01)

0.11 (0.09 to 0.13)

10.87% (9.08 to 13.08%)

< 0.01

3.5

1.11

1.00 (0.97 to 1.02)

0.11 (0.09 to 0.14)

11.03% (9.02 to 14.05%)

< 0.01

Per capita consumption (L)

1

0.95

1.06 (0.99 to 1.13)

−0.11 (−0.18 to −0.04)

−10.37% (−17.07% to −3.81%)

< 0.01

2

0.9

1.02 (0.94 to 1.10)

−0.13 (− 0.20 to − 0.04)

−12.31% (− 19.63% to −4.30%)

< 0.01

3

0.87

1.03 (0.95 to 1.10)

− 0.16 (− 0.23 to − 0.07)

−15.26% (−22.44% to −7.10%)

< 0.01

3.5

0.87

1.04 (0.96 to 1.11)

− 0.17 (− 0.24 to − 0.09)

− 16.71% (−23.18% to −8.74%)

< 0.01

NSSBs

Mean price (€/L)

1

0.95

0.94 (0.91 to 0.98)

0.01 (− 0.03 to 0.03)

0.64% (− 3.33 to 3.45%)

0.31

2

0.94

0.94 (0.92 to 0.97)

0.00 (− 0.03 to 0.03)

0.48% (−2.69 to 2.81%)

0.31

3

0.96

0.94 (0.92 to 0.97)

0.01 (− 0.02 to 0.04)

1.49% (−1.97 to 3.75%)

0.17

3.5

0.96

0.94 (0.92 to 0.98)

0.02 (− 0.02 to 0.04)

1.89% (−1.84 to 4.40%)

0.14

Per capita consumption (L)

1

0.92

0.81 (0.76 to 0.85)

0.11 (0.07 to 0.16)

14.06% (8.97 to 20.18%)

< 0.01

2

0.98

0.82 (0.78 to 0.86)

0.16 (0.12 to 0.20)

19.37% (14.94 to 24.66%)

< 0.01

3

1.03

0.85 (0.82 to 0.89)

0.18 (0.15 to 0.22)

21.24% (17.26 to 25.25%)

< 0.01

3.5

1.05

0.86 (0.83 to 0.89)

0.19 (0.16 to 0.22)

21.73% (18.25 to 25.54%)

< 0.01

Water

Mean price (€/L)

1

0.23

0.22 (0.22 to 0.23)

0.00 (0.00 to 0.01)

1.56% (0.10 to 2.98%)

0.02

2

0.23

0.22 (0.22 to 0.23)

0.00 (0.00 to 0.00)

0.64% (−0.55 to 1.94%)

0.16

3

0.22

0.23 (0.22 to 0.23)

0.00 (0.00 to 0.00)

−0.20% (−1.50 to 1.42%)

0.37

3.5

0.22

0.23 (0.22 to 0.23)

0.00 (0.00 to 0.00)

−0.66% (− 1.98 to 0.95%)

0.18

Per capita consumption (L)

1

7.3

7.09 (6.86 to 7.33)

0.21 (−0.03 to 0.44)

3.01% (− 0.44 to 6.14%)

0.05

2

7.22

7.16 (6.89 to 7.44)

0.05 (−0.22 to 0.33)

0.77% (−3.09 to 4.65%)

0.36

3

7.34

7.27 (6.96 to 7.59)

0.07 (−0.26 to 0.38)

0.92% (− 3.51 to 5.23%)

0.34

3.5

7.47

7.42 (7.11 to 7.73)

0.04 (−0.26 to 0.35)

0.59% (−3.56 to 4.78%)

0.40