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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

From: Effect of excise tax on sugar-sweetened beverages in Catalonia, Spain, three and a half years after its introduction

Category Variable Years Observed Predicted (95% CI) Absolute effect (95% CI) Relative effect (95% CI) p
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
  1. SSBs Sugar sweetened beverages, NSSBs Non-sugar-sweetened beverages, Years Years after introduction of the 2017 SSB tax