Table 6.
Marginal effects of a 10 point‐increase in TCS price on the probability of smoking (in percentage points) by socio‐demographic category.
| ME on the probability of smokinga | Absolute Differenceb | Relative Differencec | |||
|---|---|---|---|---|---|
| (in percentage points) | (ME interaction) | (OR interaction) | |||
| Educational level | |||||
| (1) None or primary | −6.480** (−10.155, −2.805) | ||||
| (2) Secondary | −6.306* (−12.623, 0.010) | (2) versus (1) | −0.173 (−4.906, 5.253) | 1.008 (0.973, 1.045) | |
| (3) Tertiary | 0.908 (−6.114, 7.931) | (3) versus (1) | 7.388* (1.128, 13.648) | 1.062* (1.005, 1.122) | |
| Age (years) | |||||
| (4) 50–65 at baseline | −4.833* (−9.588, −0.079) | ||||
| (5) 65+ at baseline | −5.034+ (−0.0103, 0.0002) | (5) versus (4) | 0.200 (−4.698, 4.297) | 0.991 (0.955, 1.029) | |
| Sex | |||||
| (6) Males | −7.610** (−12.773, −2.448) | ||||
| (7) Females | −2.530 (−7.115, 2.054) | (7) versus (6) | 5.080* (1.052, 9.107) | 1.030+ (0.999, 1.063) | |
95% Confidence Intervals in brackets.
P < 0.01,
P < 0.05,
P < 0.1.
Marginal Effect indicate how much the probability of smoking change (in percentage points) with a 10‐point increase in TCS price. They come from the logistic model including simultaneously interactions between TCS price and each sociodemographic category (education, age and sex); and were calculated following Karaka‐Mandic et al (2011) 49.
Marginal Effects (M.E.) of the interactions represent the absolute difference (in percentage points) of the TCS price marginal effect over sociodemographic category (Full results in Table S10, Supporting Information).
Odds Ratio (O.R.) of the interactions represent the relative difference (in percentage points) of the TCS price marginal effect over sociodemographic category (Full results in Table S10, Supporting Information). TCS = Tobacco Control Scale.