Table 3.

Examples of themes and subthemes

Items	Themes	Subthemes
Problems	Theme 1: Uncooperative inhabitants	1. Some inhabitants had low awareness of prevention. 2. Several inhabitants believed that talking about cancer was unlucky. 3. A very small number of inhabitants had a strong drive to avoid the anxiety, tension and fear that would be associated with being told about cancer-related terminology. 4. A few elderly inhabitants thought that taking part in health education was unnecessary because whether they developed cancer and even died was irrelevant due to their age.
	Theme 2: Poor organization	1. The timing of health education was unreasonable. The busy farming season and working hours should be avoided as much as possible. 2. The contents of health education on cancer were not formulated according to the demands of inhabitants. Inhabitants of different ages and sexes should be provided with different health education contents. 3. Health education provided inhabitants only with knowledge about cancer and not behavioral intervention guidance. 4. Lacking feedback from inhabitants after receiving health education on cancer prevented CHWs from targeted improvement.
	Theme 3: Low- frequency provision	1. So many items were needed to prepare for health education, such as education materials and participation gifts. In addition, the shortage of funds limited the amount of health education available. 2. A shortage of CHWs relative to the served population was noted. In addition, CHWs were overwhelmed by BPHS, including 49 items in 12 categories. Thus, they had to deprioritize one of the 49 items—health education on cancer. 3. CHWs had difficulty creating materials such as brochures and slides for health education on cancer independently due to a lack of time and ability. Additionally, materials provided by superior institutions such as the Centers for Disease Control and Prevention (CDC) and Center for Cancer Prevention and Control (CCP) were insufficient. 4. CHWs had little motivation to conduct health education on cancer because of unclear assessment criteria.
	Theme 4: Inadequate training for CHWs	1. A large number of CHWs failed to have a deep understanding of cancer knowledge. 2. More than a half of participants mentioned that increasing the popularity, vividness and interest in health education was difficult.
Suggestions	Theme 1: Combining online and offline education	None.
	Theme 2: Health education after screening	None.
	Theme 3: Cancer plus others	None.
	Theme 4: Health education in the workplace	None.
	Theme 5: Volunteer recruitment	None.