Exposure to Anti-Tobacco Messages and Its Association with Tobacco Use Among Zambian Adolescents: Analysis of the 2021 Global Youth Tobacco Survey

An analysis of the 2021 Global Youth Tobacco Survey reveals that while 61.6% of Zambian adolescents are exposed to anti-tobacco messages primarily through mass media and schools, this exposure is significantly influenced by social and household factors, with male adolescents and those in smoking-affected environments showing distinct patterns of reach.

The Gist

Imagine Zambia's adolescents as a huge crowd of young people standing in a giant, open-air marketplace. In this marketplace, there are two types of vendors: one group is trying to sell them tobacco (cigarettes), and the other group is trying to hand out flyers warning them about the dangers of smoking.

This study is like a headcount and a survey to see who actually received the warning flyers and who missed them.

Here is the breakdown of what the researchers found, using simple analogies:

1. The Big Picture: Who Got the Flyers?

The researchers looked at data from nearly 6,500 students aged 11 to 17. They found that about two out of every three students (62%) had seen or heard an anti-tobacco message.

• The Main Channels: The "flyers" were mostly delivered via TV and radio (like a loudspeaker in the town square). Very few students got them through newspapers or magazines (like a printed pamphlet), which suggests that print media isn't reaching the youth as effectively as broadcast media.

2. The "Irony" of Exposure: Who Heard the Warnings Most?

You might think that kids who have never touched a cigarette would hear the warnings the most. However, the study found the opposite. The students most likely to have seen the warnings were actually the ones already surrounded by smoking:

• The "Smoker's Circle": Kids who had already tried smoking, had friends who smoked, or lived with a parent who smoked were the most likely to have seen the anti-smoking ads.
• The Analogy: It's like a fire alarm going off loudest in the room where the fire is already burning. The messages are reaching the people who are already in the "smoke," perhaps because they are paying more attention to the warnings, or because the warnings are specifically targeted at their social circles.

3. The School Factor: The Best Delivery System

The single strongest predictor of seeing a warning was school.

• The Analogy: Think of school as a dedicated "information bus." If a student rode this bus (received tobacco education in class), they were almost twice as likely to have seen the anti-tobacco messages compared to those who didn't. Schools are doing a great job of delivering the message directly to the students' seats.

4. The Missing Group: The Boys

While girls and boys both heard the messages, boys were slightly less likely to have seen them than girls.

• The Analogy: If the warning flyers were being handed out at a school assembly, the girls seemed to be in the front row catching every one, while some boys were standing a bit further back or looking in a different direction. Since boys are often the ones more likely to start smoking, the researchers note that the current "broadcast" isn't quite hitting them as hard as it hits the girls.

5. What Didn't Matter?

Interestingly, the researchers found that how old the student was or what grade they were in didn't really change whether they saw the messages. The warnings were reaching 11-year-olds and 17-year-olds fairly evenly. Also, just because a student saw a teacher smoking didn't necessarily mean they saw the anti-smoking ads more or less; those two things didn't seem to be linked in the data.

The Bottom Line

The study concludes that Zambia is doing a decent job of getting anti-tobacco messages to its youth, mostly through TV, radio, and schools. However, the messages are currently hitting the "smoking circles" (kids with smoking friends or parents) the hardest.

The Takeaway: To make the campaign even better, the "loudspeakers" and "school buses" need to make a special effort to ensure the boys and those outside of smoking families don't miss the warning. The current system is working well for some, but it needs to be tuned to reach everyone equally.

Technical Summary

Technical Summary: Exposure to Anti-Tobacco Messages and Its Association with Tobacco Use Among Zambian Adolescents

Problem Statement
Adolescence is a critical period for tobacco initiation, yet evidence regarding the reach of anti-tobacco messaging in Zambia remains limited. While Zambia is a major tobacco producer and experiences rising youth experimentation (with 23.2% of students having ever smoked and 12.9% being current users), it is unclear whether mass media and school-based campaigns are effectively reaching the target population. Furthermore, there is a lack of understanding regarding whether exposure to these messages is equitable across demographic groups or if it is disproportionately concentrated among adolescents already embedded in smoking-friendly social environments. This study addresses these gaps by analyzing the prevalence and determinants of exposure to anti-tobacco messages among in-school adolescents in Zambia.

Methodology
The study utilized a cross-sectional analysis of data from the 2021 Zambia Global Youth Tobacco Survey (GYTS).

• Study Population: The analysis included 6,499 in-school adolescents aged 11–17 years with complete data on message exposure.
• Sampling: The GYTS employed a two-stage cluster sampling design (schools selected proportional to enrollment, followed by random class selection) to generate nationally representative estimates.
• Outcome Variable: Exposure to anti-tobacco messages was defined as a binary variable. Adolescents were coded as "exposed" if they reported seeing or hearing anti-tobacco messages via television, radio, newspapers, or magazines.
• Predictors: The study examined sociodemographic factors (age, sex, grade, region), behavioral factors (ever tried smoking, current smoking, friends who smoke), and environmental factors (parent/guardian smoking, school-based tobacco education, observing teachers smoking).
• Statistical Analysis: Weighted prevalence estimates were calculated to account for the complex survey design. Multivariable logistic regression was used to examine associations between exposure and predictor variables, adjusting for sociodemographic covariates. Models were fitted using R 4.5.2, with significance set at p < 0.05.

Key Results

• Overall Prevalence: Approximately 61.6% of Zambian adolescents reported exposure to anti-tobacco messages.
• Media Channels: Exposure was predominantly driven by broadcast media (television and radio), while print media (newspapers and magazines) reached a significantly smaller proportion of the population.
• Sociodemographic Associations:
  • Gender: Male adolescents had significantly lower odds of exposure compared to females (OR = 0.83, 95% CI: 0.73–0.94).
  • Age and Grade: No significant associations were found between exposure and specific age groups or grade levels.
• Behavioral and Environmental Associations: Exposure was significantly higher among adolescents with specific risk factors:
  • School Education: Those who received school-based instruction on tobacco dangers had the highest odds of exposure (OR = 1.81, 95% CI: 1.60–2.04).
  • Social Environment: Adolescents with friends who smoke (OR = 1.50), those living with a smoking parent/guardian (OR = 1.58), and those who had ever tried smoking (OR = 1.37) were more likely to report exposure.
  • Non-Significant Factors: Current smoking status and observing teachers smoking at school were not significant predictors of exposure after adjustment.

Key Contributions
This study provides the first detailed analysis of the determinants of anti-tobacco message exposure among Zambian adolescents using the 2021 GYTS data. It quantifies the penetration of tobacco control communication and identifies specific demographic and behavioral subgroups that are either well-reached or potentially underserved. Notably, the study highlights that while mass media and schools are effective channels, exposure is strongly correlated with existing smoking behaviors and social networks, suggesting that current messaging may be more effective at reaching those already at risk rather than preventing initiation in low-risk groups.

Significance and Claims
The paper claims that anti-tobacco messages in Zambia have achieved moderate penetration, reaching nearly two-thirds of in-school adolescents, primarily through broadcast media and school curricula. The authors assert that these findings support the role of schools and mass media as critical platforms for tobacco prevention, aligning with Zambia's commitments under the WHO Framework Convention on Tobacco Control (FCTC), specifically Articles 12 and 13.

However, the study modestly concludes that the strong association between exposure and smoking-related social environments (peers and parents) indicates that message reach is influenced by context. The authors suggest that to strengthen preventive impact, future strategies should be gender- and context-sensitive, specifically targeting male adolescents and extending beyond schools to address peer and family networks. The paper does not claim that current exposure levels are sufficient to reverse smoking trends but emphasizes the need for more equitable and targeted communication strategies to support national tobacco control goals.