Tobacco use is the single largest preventable cause of death globally, responsible for approximately 8 million deaths annually, of which more than 7 million are attributable to direct tobacco use and around 1.2 million to non-smokers exposed to secondhand smoke. India bears a disproportionate burden, with approximately 267 million adults using tobacco in some form — making it the world's second-largest consumer of tobacco products. Primary care settings — including primary health centers (PHCs), community health centers (CHCs), and urban health posts — serve as the first point of contact for a majority of the Indian population. They represent a unique and underutilized opportunity for early identification and counseling of tobacco users. Evidence from high-income countries consistently demonstrates that brief physician-delivered cessation advice can increase quit rates by 1–3%, and structured multi-session counseling can achieve quit rates of 15–30%. The 5A's framework (Ask, Advise, Assess, Assist, Arrange) is a widely endorsed, evidence-based protocol recommended by the WHO and multiple national guidelines for delivering cessation counseling in clinical settings. However, evidence on its effectiveness in resource-limited primary care settings in India remains sparse and fragmented. This study was designed to prospectively evaluate the real-world effectiveness of 5A's-based tobacco cessation counseling conducted in primary health centers, and to identify sociodemographic, behavioral, and clinical predictors of successful cessation at 6-month follow-up.

2.1 Study Design and Setting A prospective observational study was conducted over a period of 6 month across four primary health centers, India. The study sites were selected by purposive sampling to represent both rural and semi-urban populations. 2.2 Study Population All adult individuals (aged ≥18 years) who visited the selected PHCs during the study period and were identified as current tobacco users (smoking or smokeless) were eligible for enrollment. Exclusion criteria included: pregnant women, individuals with severe psychiatric illness, those already enrolled in a formal cessation program, and those unwilling to provide written informed consent. 2.3 Sample Size Sample size was calculated based on an anticipated 6-month cessation rate of 30% in the intervention group, with a precision of 5% and confidence level of 95%, yielding a minimum sample of 288. Accounting for a 10% attrition rate, 320 participants were enrolled. 2.4 Intervention: 5A's Counseling Protocol All enrolled participants received structured counseling based on the 5A's framework, administered by trained primary care physicians and health workers: • Ask: Tobacco use status was systematically documented at every visit. • Advise: Clear, strong, personalized advice to quit was delivered. • Assess: Readiness and motivation to quit were evaluated using the Motivation to Stop Scale (MTSS). • Assist: Behavioral counseling strategies, identification of triggers, coping skills, and referral information were provided. • Arrange: Follow-up visits were scheduled at 1 month and 3 months post-enrollment. Pharmacotherapy (nicotine replacement therapy or varenicline) was offered to participants with high nicotine dependence (Fagerstrom score ≥5) and those who specifically requested it. 2.5 Data Collection A structured, pre-tested questionnaire was administered at baseline and at each follow-up visit. Variables collected included: sociodemographic details, type and duration of tobacco use, Fagerstrom Test for Nicotine Dependence (FTND) score, motivation to quit, household tobacco use, and prior quit attempts. At 6-month follow-up, tobacco abstinence was assessed by self-report and validated using exhaled carbon monoxide (eCO) measurement (abstinence defined as eCO <6 ppm). 2.6 Statistical Analysis Data were entered into Microsoft Excel and analyzed using SPSS version 26. Descriptive statistics were used to summarize participant characteristics. Chi-square test and independent t-test were used for bivariate comparisons. Multivariate logistic regression was performed to identify independent predictors of cessation at 6 months. A p-value of <0.05 was considered statistically significant.

3.1 Baseline Characteristics A total of 320 participants were enrolled; 294 (91.9%) completed 6-month follow-up. Mean age was 38.6 ± 11.4 years; 78.1% were male. Smokeless tobacco use was more common (54.7%) than smoking (37.2%), with 8.1% using both forms. Table 1 summarizes baseline characteristics. 3.2 Cessation Outcomes At 6-month follow-up, 123 of 294 participants (41.8% of completers; 38.4% intention-to-treat) achieved validated tobacco abstinence. Among those who attended all three counseling sessions (n=192), cessation rate was 52.1%, compared to 21.3% among those who attended only the baseline session (p<0.001). Point prevalence abstinence at 1 month and 3 months was 61.3% and 49.4%, respectively. Table 1: Baseline Sociodemographic and Tobacco Use Characteristics (N=320) Characteristic n (%) Cessation at 6 months, n (%) Age (Mean ± SD): 38.6 ± 11.4 yrs — — Male sex 250 (78.1%) 96 (38.4%) Education ≥ Secondary 174 (54.4%) 82 (47.1%)* Rural residence 208 (65.0%) 74 (35.6%) Smoking only 119 (37.2%) 44 (37.0%) Smokeless tobacco only 175 (54.7%) 70 (40.0%) Both forms 26 (8.1%) 9 (34.6%) FTND score ≥5 (high dependence) 138 (43.1%) 42 (30.4%)* Household tobacco users present 182 (56.9%) 54 (29.7%)* Prior quit attempt 97 (30.3%) 48 (49.5%)* * p<0.05 compared to non-cessation group; FTND = Fagerstrom Test for Nicotine Dependence 3.3 Predictors of Cessation On multivariate logistic regression, four variables independently predicted cessation at 6 months (Table 2): Table 2: Multivariate Logistic Regression — Predictors of Tobacco Cessation at 6 Months Predictor Variable aOR 95% CI p-value Age (per year increase) 1.04 1.01 – 1.07 0.011 Education ≥ Secondary level 2.31 1.44 – 3.71 <0.001 High motivation to quit (MTSS ≥5) 3.12 1.89 – 5.14 <0.001 No household tobacco user 2.08 1.27 – 3.41 0.004 Prior quit attempt 1.78 1.06 – 2.99 0.030 All 3 counseling sessions attended 3.94 2.31 – 6.72 <0.001 aOR = adjusted Odds Ratio; MTSS = Motivation to Stop Scale; CI = Confidence Interval 3.4 Reasons for Relapse Among participants who relapsed after initial cessation (n=71), the most commonly cited reasons were: peer/social pressure (46.5%), stress and psychological triggers (35.2%), withdrawal symptoms (28.2%), and presence of tobacco users at home (22.5%).

This prospective study demonstrates that structured 5A's-based tobacco cessation counseling delivered in primary care settings achieves a 6-month validated abstinence rate of 38.4% (intention-to-treat), rising to 52.1% among participants who attended all three counseling sessions. These findings are comparable to, or exceed, cessation rates reported from similar primary care interventions in South Asian settings (25–45%), while affirming the feasibility and acceptability of such programs at the PHC level. The dose-response relationship between counseling sessions attended and cessation success is among the most clinically significant findings of this study. The nearly 2.5-fold higher cessation rate in those receiving all three sessions underscores the importance of continuity of care and repeated reinforcement in behavioral change programs. This aligns with systematic reviews demonstrating that multi-contact cessation counseling (≥4 sessions, ≥10 minutes each) is significantly more effective than single-session brief advice. Motivational readiness emerged as the strongest single predictor of cessation (aOR 3.12), consistent with Prochaska's Transtheoretical Model. Participants in the contemplation or preparation stages at baseline showed substantially higher quit rates, highlighting the need for motivational interviewing techniques and tailored readiness-based counseling approaches in primary care. The negative impact of household tobacco use (aOR 2.08 for cessation in absence of household users) reflects the well-established role of social environmental factors in tobacco behavior. Second-hand smoke exposure, normalization of tobacco use, and social cueing within the household represent significant barriers to cessation. Family-level interventions and couple- or household-based counseling strategies may help address this challenge. The higher cessation rates among better-educated individuals (aOR 2.31) likely reflect greater health literacy, better comprehension of cessation information, and stronger self-efficacy. This points to the need for simplified, culturally adapted counseling materials for low-literacy populations. Limitations of this study include: (i) self-reported abstinence as the primary outcome, though validated by eCO measurement; (ii) absence of a comparison group receiving no counseling, limiting causal inference; (iii) single-district study potentially limiting generalizability; and (iv) social desirability bias cannot be excluded.

Tobacco cessation counseling based on the 5A's framework is effective and feasible in primary care settings in India, achieving clinically meaningful abstinence rates. Multi-session counseling, addressing motivational readiness, household tobacco use, and socioeconomic barriers, significantly improves outcomes. These findings strongly support the systematic integration of structured cessation counseling into routine primary health care delivery, accompanied by training for frontline health workers and community-level tobacco control strategies.

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