Background
Smoking withdrawal can be difficult due to nicotine dependence (ND). Individual, environmental and social factors must be considered when researching ND. The objective of the present study is to describe ND and to analyse associations between ND and smoking-related and background factors among daily smoking Estonian physicians.
Methods
A cross-sectional postal survey was used to collect data from Estonian physicians in 2014. The initial sample consisted of all practising physicians in Estonia (n=5666). In total, 2939 physicians participated. The corrected response rate was 53.1%. The current study sample was restricted to physicians who smoked daily (n=171). The outcome variable was ND level, measured using the Fagerström Test for Nicotine Dependence (FTND). The mean age of smoking initiation was calculated, along with the standard deviation and the distribution of ND levels with 95% confidence intervals (CIs). T-tests and chi-square tests were used to test for differences between groups. To compensate for non-response, the data were weighted. Using multiple logistic regression, the association between ND level (at-least-moderate vs low) and smoking-related and background factors was determined. Crude and fully adjusted odds ratios (ORs) with 95% CIs were calculated.
Results
The mean FTND score for daily smoking physicians was 2.8±2.1, and 60.8% of them had low, 33.1% moderate and 6.1% high ND levels. The mean age of smoking initiation differed statistically between physicians with low and at-least-moderate ND levels (21.0±5.1 and 18.4±3.3, respectively) (p<0.001). In the adjusted model, having at least moderate ND levels was associated with a younger age of smoking initiation (OR=0.82, 95% CI 0.72–0.94). After adjustment, ND levels were not significantly associated with the desire to quit, motives to quit and gender. No association was found between ND level and other background factors.
Conclusions
More than half of daily smoking Estonian physicians had low ND levels. A higher ND level was associated with a younger age of smoking initiation. Knowledge of ND and related factors is useful in the development of smoking cessation counselling services for physicians.