Table 1
Comparison between smokers and non-smokers after two years from the SSP intervention using the Mann-Whitney U test and Kruskal-Wallis test.
| SMOKERS VS. NON-SMOKERS | P VALUE | |
|---|---|---|
| Age | 45.68 ± 10.35 vs. 42.73 ± 10.45 | 0.391 |
| Seniority | 17.17 ± 13.56 vs. 13.47 ± 13.94 | 0.558 |
| Sex | ||
| Male | 7 (58.3%) vs. 5 (41.7%) | 0.783 |
| Female | 18 (64.3%) vs. 10 (35.7%) | |
| Shift work | 14 (56.0%) vs. 11 (44.0%) | 0.376 |
| Professional category * | 25 (62.5%) vs. 15 (37.5%) | 0.008 |
| Administrative personnel (1) | 11 (78.6%) vs. 3 (21.4%) | |
| Technicians and biologists (2) | 8 (88.9%) vs. 1 (11.1%) | |
| Nurses and physician (3) | 6 (35.3%) vs. 11 (64.7%) | |
| Comparison (3) vs (1) | 0.043 | |
| Comparison (3) vs (2) | 0.024 | |
[i] Notes: * Kruskal-Wallis test.
Table 2
Pre vs. post SADs comparison after 6 months, 12 months, and 24 months from the SSP course in the whole sample and in smokers and non-smokers using the Wilcoxon signed rank test.
| SADS PRE-SSP VS. POST-SSP(MEAN ± SD) | P VALUE | |
|---|---|---|
| Overall | ||
| 6 months | 0.5 ± 1.5 vs. 0.1 ± 0.0 | 0.043 |
| 12 months | 1.3 ± 2.7 vs. 0.2 ± 1.1 | 0.036 |
| 24 months | 2.7 ± 4.6 vs. 0.49 ± 1.5 | 0.010 |
| Smokers | ||
| 6 months | 0.5 ± 1.4 vs. 0.2 ± 0.0 | 0.109 |
| 12 months | 1.5 ± 2.7 vs. 0.3 ± 1.4 | 0.092 |
| 24 months | 3.1 ± 4.9 vs. 0.8 ± 2.0 | 0.038 |
| Non-smokers | ||
| 6 months | 0.7 ± 2.1 vs. 0.1 ± 0.0 | 0.180 |
| 12 months | 0.9 ± 2.9 vs. 0.2 ± 1.1 | 0.180 |
| 24 months | 1.5 ± 3.7 vs. 0.8 ± 2.0 | 0.131 |
[i] Notes: SADs: sickness absence days; SSP: Stop Smoking Promotion.
Table 3
Economic evaluation of the SSP intervention.
| ECONOMIC EVALUATION | CRITERIA | |
|---|---|---|
| Invested capital | € 13,200.00 | Per capita cost of the training course: € 330,00 |
| Gross profit | € 38,134.25 | Weighted sum of the per capita recovered time in a year, considering the mean cost of a working day: € 169,80 and the mean time of six minutes per cigarette |
| Net profit | € 24,934.25 | Difference between the gross profit and the invested capital |
| ROI | 1.90 | Ratio between the net profit and the invested capital (considering the one-year period) |
| Pre-SSP situation | € 1,682.45 | Mean hours lost for smoking during work shifts |
| Post-SSP situation | € 0.00 | Recovered mean hours (from non-smokers) |
| BEP | 7.85 | The number of participants who quit smoking at which the costs of the SSP program would equal the profit |