Table 2. Smoking behavior and smoking cessation-related indicators among current cigarette smokers after self-reported CHD.

	Current cigarette smokers
	CHD yes (N = 269)		CHD no (N = 3371)
	% [95% CI]	n	% [95% CI]	n
Cigarettes per day	Mean (SD): 15.8 (8.7)		Mean (SD): 5.3 (8.1)
Severity of cigarette dependence (HSI)*1
Low	31.2 [25.7; 37.1]	84	29.4 [27.9; 31.0]	991
Medium	56.1 [50.0; 62.2]	151	61.6 [60.0; 63.2]	2 075
High	10.0 [6.7; 14.3]	27	6.0 [5.2; 6.8]	201
Smoking cessation attempts in the past year*2
None	88.8 [84.5; 92.3]	239	94.7 [93.9; 95.5]	3 194
At least one	10.4 [7.0; 14.7]	28	4.9 [4.2; 5.7]	165
Number of smoking cessation attempts in the past year *3	Mean (SD) [min–max]: 1.8 (1.8) [1–10] Median (IQR): 1.0 (1.0)		Mean (SD) [min–max]: 2.1 (5.5) [1–50] Median (IQR): 1.0 (1.0)
Motivation for smoking cessation *4
Motivated	19.7 [15.1; 25.0]	53	17.7 [16.4; 19.0]	595
Not motivated	79.9 [74.6; 84.5]	215	81.9 [80.6; 83.2]	2 761

The data is presented as percentages (absolute numbers), with 100% representing the total for each column; the figures are aggregated from nine survey waves carried out in 2023 and 2024. The column percentages do not always add up to exactly 100% due to rounding. Values below 100% are due to missing data.

^*1Heaviness of Smoking Index (HSI) is calculated based on the number of cigarettes smoked per day and the time until the first cigarette after waking-up: low cigarette dependence: HSI 0–1; moderate cigarette dependence: HSI 2–4; high cigarette dependence: HSI 5–6;

^*2Indicates serious attempts to stop smoking within the past twelve months;

^*3Only persons with more than one attempt;

^*4Measured using the Motivation to Stop Smoking Scale (MTSS): Response options 1–2 = not motivated; response options 3–7 = motivated.

HSI, Heaviness of Smoking Index; IQR, interquartile range; CHD, coronary heart disease; CI, confidence interval; min, minimum; max, maximum; SD, standard deviation