Table 2.
Logistica and linearb regression to predict reasons for not using smoking cessation aids from demographic, smoking behaviour, motivational, and health-related variables
| Prediction variables | Scale "Social and environmental barriers" OR (CI 95%) |
Scale "SCA unnecessary" β-weight |
||
| univariate | multivariable | univariate | multivariable | |
| demographic variables | ||||
| gender | ||||
| malec | ||||
| female | .559 (.371–.843) | .620 (.376–1.020) | -.019 | -d |
| age | 1.004 (.989–1.019) | - | -.065 | - |
| educational level | ||||
| < 10 yearsc | ||||
| = 10 years | .382 (.219–.668) | .500 (.267–.936) | -.013 | |
| > 10 years | .220 (.111–.434) | .297 (.139–.632) | -.012 | - |
| marital status | ||||
| married/living with a partnerc | ||||
| not married/not living with a partner | .783 (.486–1.262) | - | -.019 | - |
| smoking behaviour variables | ||||
| cigarettes per day | 1.048 (1.015–1.082) | 1.015 (.969–1.063) | .071 | - |
| FTND-Scoree | 1.274 (1.098–1.477) | 1.206 (.992–1.466) | .041 | - |
| age at onset | ||||
| < 16 yearsc | ||||
| 16–18 years | 1.219 (.758–1.959) | .012 | ||
| > 18 years | 1.091 (.613–1.942) | - | -.070 | - |
| quit attempts within the last 12 months | ||||
| 0c | ||||
| 1 | 1.379 (.780–2.438) | .011 | ||
| 2–5 | 1.528 (.852–2.742) | .057 | ||
| >5 | 1.051 (.389–2.839) | - | .016 | - |
| smoking intensity | 1.012 (1.003–1.021) | 1.001 (.990–1.013) | .076 | - |
| motivational variables | ||||
| intention to quit within the next six months | ||||
| noc | ||||
| yes | 1.583 (1.013–2.473) | 2.008 (1.207–3.338) | .121** | .113** |
| pros of non-smoking | 1.148 (.957–1.376) | - | .078 | - |
| self-efficacy | .885 (.696–1.125) | - | .063 | - |
| health-related variables | ||||
| mental health | .927 (.684–1.257) | - | -.083* | -.073 |
| general health | .989 (.976–1.001) | - | .022 | - |
All analyses were adjusted for study membership (population-based vs. general practice patient sample) as well as study group membership (intervention vs. control condition).
a Scale „Social and environmental barriers", due to substantial non-normality the scale was dichotomised using 0 = no agreement, 1 = at least minimal agreement
b Scale "SCA unnecessary"
c Reference category
d Not sufficient for multivariable analysis
e Because cigarettes per day were used as separate predictor, the FTND score was computed without cigarettes per day to avoid multi-collinearity
* p < .05; ** p < .01