Grip&Health: Behavioural Intervention to Reduce Smoking, Stress and Improve Financial Health in Low-SES in Rotterdam (Grip&Health)

Change in self-reported Stress. The Depression, Anxiety and Stress (DASS) questionnaire will be used to measure change in self-reported stress from baseline (T0), at 4 weeks after baseline (T1) and at 12 weeks after baseline (T2). The DASS is a 21-item questionnaire with three self-report scales (Depression, Anxiety and Stress). Scores for depression, anxiety and stress are determined by summing the scores of the 21 items. Ranges for depression, anxiety and stress are 0-28, 0-20, and 0-33, respectively. Lower scores indicate less severity. In this study participants will be asked to complete the DASS-21 questionnaire at three different time points (T0, T1 and T2). This is done so the investigators can assess the change in scores of self-reported stress across time points (T0, T1 and T2).

Change in objective evaluations of stress based on heart rate variability (HRV) from baseline (T0), at 4 weeks after baseline (T1) and at 12 weeks after baseline (T2). HRV indicates variability of time intervals between two consecutive heartbeats with each heartbeat having a R-wave which peaks in the R peak. The variations between two RR intervals are defined as HRV. A higher HRV value reflects a greater variation of the RR whereas a lower HRV indicates small variation. Participants beat-to-beat heart rate is measured using wrist wearables provided by Philips. During the measurements, the wearables are mounted on a participant's wrist and the participant is instructed to sit in a resting state for five minutes while the beat-to-beat heart rate is recorded. HRV analysis is derived from the recorded data using an appropriate software program. To assess change over time points (T0, T1 and T2), participants's beat-to-beat heart rate will be measured at three time points

Change in self-reported Smoking. The Global Adult Tobacco Survey (GATS) questionnaire will be used to measure change in self-reported smoking from baseline (T0), at 4 weeks after baseline (T1) and at 12 weeks after baseline (T2). Participants will be asked to complete the questionnaire at three time points (T0, T1 and T2). This is done so the investigators can assess the change in self-reported smoking across time points.

Fagerstrom Test for Nicotine Dependence (FTND) questionnaire will be used to measure change in level of nicotine dependence from baseline (T0), at 4 weeks after baseline (T1) and at 12 weeks after baseline (T2). The FTND test is used to assess the intensity of physical addiction to nicotine. The test is designed to provide an ordinal measure of nicotine dependence related to cigarette smoking. It contains six items that evaluates the quantity of cigarette consumption, the compulsion to use and dependence. Yes/No items on FTND are scores from 0-1 and multiple choice items are scores from 0-3. The items are summed to yield a total score of 0-10. The higher the FTND, the more intense a participant's physical dependence on nicotine. In this study, participants will be asked to complete the FTND at three time points (T0, T1 and T2). This is done so the investigators can assess the change in the level of nicotine dependence across time points.

Change in exhaled Carbon Monoxide (CO) levels from baseline (T0), at 4 weeks after baseline (T1) and at 12 weeks after baseline (T2). The CO breath test is a biological method used to verify smoking or non-smoking status of participants. In this study, participants's exhaled CO levels will be measured (Micro SmokeLyzer; Bedfont, UK). A CO level ≥10 ppm reflects a heavy smoker. During the measurements, participants are instructed to hold their breath for 15 seconds and subsequently to slowly exhale into a mouthpiece connected to the SmokeLyzer device until their lungs are empty. Participants CO levels will be recorded at three time points (T0, T1 and T2). This is done so the investigators can assess the change in C0 levels across time points.

The Short Form Health Survey version 2 (SF-12v2) questionnaire will be used to measure change in self-perceived health from baseline (T0), at 4 weeks after baseline (T1) and at 12 weeks after baseline (T2). The SF-12v2 is a 12-item with three dimensions both for functioning (physical, social and role) and for wellbeing (mental health, general health perceptions and pain). In this study, participants will be asked to rate their general health on a Likert-type scale (1=poor, 2=fair, 3= good, 4= very good, and 5=excellent). Low scores (poor) on the general health scale represent a person who believes his/her health to be poor and high score (excellent) represents someone who sees his/her health as excellent. Participants will be asked to complete the SF-12v2 questionnaire at three time points (T0, T1 and T2). This is done so the investigators can assess the change in health perceptions across time points.

Change in participant's's financial health will be measured from baseline (T0), at 4 weeks after baseline (T1) and at 12 weeks after baseline (T2). In this study, participants's financial health will be measured by asking them to report: 1) their total monthly income; 2) their spouse/partner's total monthly income; and 3) money shortages experienced in the past month. Participants will be asked to fill this questionnaire in at three time points (T0, T1 and T2). This is done to assess changes in financial health across time points.