Using the Theory of Planned Behavior to determine COVID-19 vaccination intentions and behavior among international and domestic college students in the United States

Vaccination is the most effective strategy for preventing infectious diseases such as COVID-19. College students are important targets for COVID-19 vaccines given this population's lower intentions to be vaccinated; however, limited research has focused on international college students' vaccination status. This study explored how psychosocial factors from the Theory of Planned Behavior (TPB; attitudes, perceived behavioral control, subjective norms, and behavioral intentions) related to students' receipt of the full course of COVID-19 vaccines and their plans to receive a booster. Students were recruited via Amazon mTurk and the Office of the Registrar at a U.S. state university. We used binary logistic regression to examine associations between students' psychosocial factors and full COVID-19 vaccination status. Hierarchical multiple regression was employed to evaluate relationships between these factors and students' intentions to receive a booster. The majority of students in our sample (81% of international students and 55% of domestic students) received the complete vaccination series. Attitudes were significantly associated with all students' full vaccination status, while perceived behavioral control was significantly associated with domestic students' status. Students' intentions to receive COVID-19 vaccines were significantly correlated with their intentions to receive a booster, with international students scoring higher on booster intentions. Among the combined college student population, attitudes, intentions to receive COVID-19 vaccines, and subjective norms were significantly related to students' intentions to receive a booster. Findings support the TPB's potential utility in evidence-based interventions to enhance college students' COVID-19 vaccination rates. Implications for stakeholders and future research directions are discussed.

The factors affecting substance abuse relapse based on theory of planned behavior in male addicts covered by addiction treatment centers in Southern Iran

BACKGROUND

Given the destructive nature of addiction and its relapse after quitting, the present study aimed to investigate the factors affecting substance abuse relapse based on the Theory of Planned Behavior (TPB) in male addicts covered by addiction treatment centers in Shiraz, Iran.

METHODS

This cross-sectional study was conducted on 400 male addicts covered by addiction treatment centers in Shiraz, Iran, in 2021-2022. The data collection tool was a researcher-made questionnaire. Data were analyzed using SPSS-22 software through descriptive statistical methods, linear regression, and binary logistic regression.

RESULTS

190 people (47.50%) were aged 31-40 years, 265 people (66.25%) were married, 224 people (56%) lived with their spouses, and 192 people (48 percent) had their first use at the age of 16-20. The substance respondents used were methamphetamine (59.5%), heroin (53%), opium (48%), and alcohol (40%). 138 people (34.5%) had their first place of consumption at friends' houses (Tables 1 and 2). 342 people (85.5%) had a history of relapse, and 172 people (50.29%) had 1-5 relapses. Marital status, occupation, and income were among the demographic risk factors, and addicted friends and close relatives were among the behavioral risk factors for drug relapse among people with a history of relapse. Personal desire and the insistence of friends were also among the individual and interpersonal factors of drug use among participants. The regression results showed that the constructs of awareness, attitude, subjective norms, perceived behavioral control, and behavioral intention were predictors of drug relapse among addicts (P < 0.05).

CONCLUSION

The current study's findings indicate that among the behavioral risk factors for drug relapse in individuals with a history of relapse are addicted friends and close relatives, while marital status, occupation, and income are among the demographic risk variables. Among the individual and interpersonal factors influencing drug usage among participants were personal desire and friends' insistence. Furthermore, the findings indicated that the TPB's structures might be used to predict drug relapse in addicts.

Examining health sciences students' intention to uptake COVID-19 vaccination using the theory of planned behavior

To examine the association between the theory of planned behavior (TPB) constructs and Health Sciences students' intentions to receive COVID-19 vaccination. A cross-sectional study was conducted in Saudi Arabia by recruiting Health Sciences students as participants. Using Structural Equation Modeling (SEM), the proposed TPB model was evaluated. The sample of 505 individuals consisted of more males (n = 275; 54.5%) than females and was relatively young (88% were between the ages of 18 and 30). The suggested TPB model explained 78.2% of the variation in intention to get COVID-19 immunization. We found that greater levels of perceived behavioral control (β = 1.58, p < .001) and attitude (β = .44, p < .001) strongly predicted increased vaccination intentions. The subjective norm construct was not a significant predictor of vaccination intentions (β = 0.06, p = .34). The findings of this study indicate that the TPB can be utilized effectively to obtain insight into the factors associated with COVID-19 adherence and help in the development of effective COVID-19 intervention strategies.

Predicting the Protective Behavioral Intentions for Parents with Young Children Living in Taipei City and New Taipei City Using the Theory of Planned Behavior for Air Polluted with PM2.5

While studies on the damaging effects of PM2.5 air pollution are abundant, studies seeking to understand the factors that influence human behaviors for the avoidance of exposure to PM2.5 are lacking. Theory of Planned Behavior (TPB) can be used to investigate the effects of Attitudes (AT), Subjective Norms (SN), and Perceived Behavioral Controls (PBC) in the Behavioral Intentions (BI) of parents with young children against exposure to PM2.5. Questionnaires, based on the TPB used to predict BI, were distributed to 610 parents in Taipei City and New Taipei City. Our results revealed that the AT of both groups had a significant positive predictive effect on their PBC and BI. While the SN of the Taipei group affected BI directly, there was no significant effect on the BI from the SN of the New Taipei group. Using path analysis, Taipei City and New Taipei City groups had different BI paths: All five hypotheses are statistically significant and form four paths in the Taipei City group. While only four hypotheses in the New Taipei City group formed three paths and no path for SN-BI. Both groups formed behaviors that were based on the SN/PBC around them, which ultimately contributed to the BI of their protective behaviors.

Effects of safety interventions toward workers' behaviors using the theory of planned behavior in the rubber wood processing industry

Objectives. Rubberwood manufacturing has a wide range of occupational safety hazards. Workers' safety behaviors are substandard. This quasi-experimental study aimed to determine the factors affecting safety behaviors using the theory of planned behavior (TPB) and compare the effects of safety intervention programs on workers' behaviors. Methods. The sample comprised workers from a rubberwood processing factory. Exploratory and confirmatory factor analyses were performed to validate the TPB constructs. The constructs were also analyzed before and after the interventions using structural equation modeling to confirm the observed variables. The interventions included conducting job safety analysis, establishing safety standard operation procedures and launching a behavioral promotion campaign. A t test was used to compare the constructs' intervention effects. Results. The structural equation model adequately fit the data and confirmed that the constructs were aligned with the TPB. Most path coefficients were statistically significant after the interventions were implemented. 'Attitude' and 'perceived behavioral control' directly and significantly affected 'intention'. 'Intention' was an essential mediator to 'behaviors'. The improvement in workers' behaviors was evident. Conclusions. According to the TPB, safety program interventions helped enhance workers' behaviors. Hence, based on participatory approaches, sustainable safety interventions should be maintained for all levels of personnel in the organization.

Exploring the determinants to accept dementia screening among patients at high risk of dementia based on the theory of planned behavior: A cross-sectional study

BACKGROUND

Dementia represents a major public health challenge. Despite numerous initiatives promoting screening for early cognitive impairment to help prevent or delay its onset, participation remains limited. Moreover, there is limited evidence regarding screening intentions and predictors among populations at high risk of dementia. This study used the theory of planned behavior to identify modifiable factors associated with screening participation.

METHODS

This cross-sectional survey was conducted from November 16, 2021, to April 2, 2022, and involved 439 individuals at high risk of dementia selected using convenience sampling from two major regional communities in Guangzhou, China. A validated custom questionnaire based on the theory of planned behavior was used for data collection, and logistic regression and structural equation modeling were applied to identify related predictors.

RESULTS

Overall, 62 % of the participants expressed willingness to undergo dementia screening. Behavioral intention was primarily associated with Perceived behavioral control (PBC, path coefficient = 0.36), Subjective norm (path coefficient = 0.16), and Attitude (path coefficient = 0.13). Additionally, PBC was associated with a positive attitude toward dementia screening (path coefficient = 0.39).

CONCLUSIONS

PBC, subjective norm, and attitudes are associated with dementia screening willingness among high-risk groups. Healthcare professionals and policymakers should focus on enhancing favorable attitudes toward screening, increasing familial encouragement, and reducing perceived barriers to developing effective prevention or intervention strategies.

Factors related to milk donation based on the theory of planned behavior in pregnant women

The willingness to donate milk is influenced by maternal behavior, and the Theory of Planned Behavior is recognized as a significant predictor of this action. This study aims to identify the factors associated with milk donation among pregnant women based on the Theory of Planned Behavior. This descriptive and analytical cross-sectional study utilized stratified and convenience sampling methods on 337 pregnant women attending women's health and midwifery clinics affiliated with Mashhad University of Medical Sciences in 2024. Data were collected using a demographic questionnaire and a milk donation intention questionnaire based on the constructs of the Theory of Planned Behavior. Statistical analyses, including descriptive and inferential tests at a significance level of 0.05, were performed using SPSS-26. The average age of pregnant women was 30.16 years. The willingness of pregnant women to donate milk was relatively adequate. Urban-dwelling pregnant women showed a greater willingness to donate milk compared to their rural counterparts (p = 0.031). Age (r = 0.118), awareness (r = 0.413), attitude (r = 0.562), perceived behavioral control (r = 0.542), and subjective norms (r = 0.521) had positive and significant correlations with the intention to donate milk among participants (p < 0.05). Awareness was significantly correlated with attitude (r = 0.575), perceived behavioral control (r = 0.555), and subjective norms (r = 0.503). According to the results, the Theory of Planned Behavior serves as an appropriate predictor for the intention to donate milk among pregnant women. Therefore, to establish and expand milk banks, policymakers in health should consider utilizing the Theory of Planned Behavior in pregnant women. Tailoring milk donation programs based on related factors identified in this study could enhance overall donation rates and support infants in need.

Theory of Planned Behavior and Active Duty Air Force Members' Mental Health Help-Seeking

INTRODUCTION

Although military members often encounter significant atypical stressors while serving, many service members are still reluctant to seek mental health (MH) treatment. Help-seeking behavior for MH needs is a rising concern for active duty Air Force personnel. Conditions such as post-traumatic stress disorder, depression, anxiety, and substance abuse are just a few issues that military members deal with, but things like stigma, attitudes toward MH, and behavioral control might keep these individuals from seeking services. This study utilizes the theory of planned behavior (TPB) to identify better and understand barriers to the help-seeking behavior of active duty Air Force members.

MATERIALS AND METHODS

The 2017 Air Force Community Feedback Tool was used for this study. This confidential survey was completed by a large sample of the military population (N = 10,705). The survey was used to examine relationships between the TPB-related variables and respondents with mood problems identifying a need for professional counseling, seeking MH services, and reporting that the services met their needs. Multiple linear and binary logistic regression models were utilized to analyze findings from this sample.

RESULTS

This study highlights how attitudes, subjective norms, and perceived behavioral control impact help-seeking behavior for these individuals. Findings include the MH providers' good reputations, wait times for services, ease of access to care, and negative experiences with supervisor permission, all of which showed a statistically significant impact on help-seeking behavior. Dependent variables included "I need professional counseling," "I contacted a MH care provider in the past year to try to meet this need," and "How much the MH care provider helped you meet your needs." Each of these variables had statistically significant relationships with the connecting variables of the TPB.

CONCLUSIONS

Findings from this study reveal how attitudes, subjective norms, and perceived behavioral control play an essential role in an active duty Air Force member's decision to seek help for MH concerns. This study suggests that active duty military members are less concerned about the belief that seeking MH care could harm their reputations and more aware of the potential negative reputations of MH clinics. Finally, actionable steps are outlined to better support help-seeking behavior, which might be recommended to better train and encourage military leaders to address the MH needs of themselves and the members of their units.

Comparative effect of physical health training and psychological training of the theory of reasoned action (TRA) model on the life quality of patients with diabetes in Tehran, Iran: utilization of message texting

BACKGROUND AND PURPOSE

Providing physical health and mental health training promotion is necessary for a sustainable change in attitude and lifestyle of diabetic patients. The present study was conducted with the aim of comparing the effect of physical health training and psychological training of the theory of reasoned action (TRA) model on the life quality of patients with type 2 diabetes.

METHODS

This experimental study was conducted in 2022 with two intervention groups and one control group consisting of 129 patients with type 2 diabetes who were referred to Imam Khomeini Hospital in Tehran. Over the course of one month, each individual in intervention group 1 received 15 text messages focusing on physical health, while intervention group 2 received 15 psychological text messages related to the TRA. The control group did not receive any text messages during this period. The data collection tool used was the "Audit of Diabetes-Dependent Quality of Life (ADDQoL)" questionnaire, which was completed by the participants before and after the intervention. The data were analyzed using SPSS version 16 software at a statistical significance level of 0.05.

RESULTS

In the intervention-1 group, the average life quality score was 8.51 units (P < 0.001), while in the intervention-2 group, it was 19.25 units (P < 0.001) higher than the control group. The psychological training group had a 17.62 units (P < 0.05) lower average fasting blood sugar (FBS) and a 10.74 units (P < 0.001) higher average quality of life compared to the physical training group.

CONCLUSION

The results of this study showed that the effectiveness of psychological training of the TRA model in improving life quality and reducing FBS in patients with diabetes is greater than physical health training. It is suggested that policy makers and health managers base future plans on physical health promotion training along with TRA model mental health training for the development of education in patients with diabetes. Specialists and healthcare workers can also act to improve personal health characteristics, especially those related to reducing FBS and increasing the quality of life of patients with diabetes, by using training through mobile phone text messages, particularly with psychological content TRA based.

Towards determining perceived audience intent for multimodal social media posts using the theory of reasoned action

Increasing use of social media has resulted in many detrimental effects in youth. With very little control over multimodal content consumed on these platforms and the false narratives conveyed by these multimodal social media postings, such platforms often impact the mental well-being of the users. To reduce these negative effects of multimodal social media content, an important step is to understand creators' intent behind sharing content and to educate their social network of this intent. Towards this goal, we propose INTENT-O-METER, a perceived human intent prediction model for multimodal (image and text) social media posts. INTENT-O-METER models ideas from psychology and cognitive modeling literature, in addition to using the visual and textual features for an improved perceived intent prediction model. INTENT-O-METER leverages Theory of Reasoned Action (TRA) factoring in (i) the creator's attitude towards sharing a post, and (ii) the social norm or perception towards the multimodal post in determining the creator's intention. We also introduce INTENTGRAM, a dataset of 55K social media posts scraped from public Instagram profiles. We compare INTENT-O-METER with state-of-the-art intent prediction approaches on four perceived intent prediction datasets, Intentonomy, MDID, MET-Meme, and INTENTGRAM. We observe that leveraging TRA in addition to visual and textual features-as opposed to using only the latter-results in improved prediction accuracy by up to 7.5 % in Top-1 accuracy and 8 % in AUC on INTENTGRAM. In summary, we also develop a web browser application mimicking a popular social media platform and show users social media content overlaid with these intent labels. From our analysis, around 70 % users confirmed that tagging posts with intent labels helped them become more aware of the content consumed, and they would be open to experimenting with filtering content based on these labels. However, more extensive user evaluation is required to understand how adding such perceived intent labels mitigate the negative effects of social media.

Factors influencing antibiotic prescribing by nurse practitioners: A quantitative pilot study using the theory of planned behavior

BACKGROUND

The overuse of antibiotics contributes to the development of antibiotic resistance (AR) and exposes patients to potential antibiotic-related harm. Nurse practitioners (NPs) are well positioned to optimize antibiotic use; however, little is known about the factors influencing NP prescribing behaviors.

PURPOSE

Describe the knowledge, attitude, subjective norms, and perceived behavioral control in prescribing antibiotics among NPs practicing at a large university-affiliated health care system in the northeast United States.

METHODOLOGY

This was a cross-sectional online anonymous survey using the Theory of Planned Behavior. Descriptive statistics were used to describe the sample. Nonparametric tests were used to examine differences in the dependent variables by demographic characteristics.

RESULTS

One hundred seventy-four of 618 NPs (28%) completed the survey. Almost all considered AR a problem in the United States, but only half considered it a problem in their health care setting. More than half indicated they prescribed antibiotics less than 25% of the time in daily practice. Most were confident in making antibiotic prescribing decisions. There was a positive relationship between years of experience as NPs and their confidence in making antibiotic prescribing decisions ( p < .003) and an inverse relationship between years of experience as NPs and asking for advice from physicians or pharmacists when prescribing antibiotics ( p < .002).

CONCLUSION/IMPLICATIONS

With increasing numbers of NPs managing infectious diseases and prescribing antibiotics, these findings will inform interventions to support appropriate prescribing behaviors.

The effectiveness of teaching complementary and alternative medicine based on the components of theory of planned behavior on nutrition students: multicenter research study

OBJECTIVE

Safe and beneficial use of complementary and alternative medicine (CAM) modalities results from integrating CAM education into curricula and increasing CAM knowledge. We sought how much teaching CAM procedures in a virtual environment can influence the components of the theory of planned behavior (TPB), including knowledge, attitude, behavioral intention, and behavior of nutrition students.

METHODS

This cross-sectional descriptive-analytic study was conducted on 162 undergraduate nutrition students were selected through convenience sampling based on inclusion criteria in 2021-2022. Data were collected through a validated researcher-made CAM questionnaire that was designed based on TPB questionnaire that consisted of four constructs (knowledge, attitude, behavioral intention, and behavior). The content validity index and content validity ratio of the questionnaire were evaluated.

RESULTS

Our results revealed that students who significantly scored the highest scores in attitude, behavioral intention, and behavior constructs were the students who claimed that "teaching two credits of CAM for nutrition students is not enough" (p. value =  < 0.001, < 0.001, and 0.005, respectively). In addition, these students used treatment methods of CAM for themselves, suggested treatment methods of CAM to others, and followed the recommendations of the CAM specialists (for three pairwise comparisons: p. value =  < 0.001, < 0.001, and < 0.001, respectively). The attitude could predict 70% of behavioral intention. However, attitude and behavioral intention could predict 90% of behavior.

CONCLUSION

Attitude was the most critical determinant influencing behavioral intention and behavior. CAM teaching using evidence-based CAM-ITM principles with a succinct, concerted, and collaborative curriculum, integration of CAM into continuing education, and integration of educational CAM programs continuously for several years into the academic curriculum in the actual setting influence the success of the educational CAM program.

Parents' intention to vaccinate their preschool children against COVID-19: Combining the health belief model and the theory of planned behavior

The vaccination rate of COVID-19 in preschool children is low, and parents' intention to vaccinate their children is also low due to multiple factors. This study aimed to establish an integrated model based on the Health Belief Model (HBM)and Theory of Planned Behavior (TPB), to explore the factors influencing parents' intention to vaccinate their preschool children with the first and second doses of COVID-19 vaccines. A total of 1264 parents of preschool children from 10 kindergartens participated in this study. Hierarchical multiple logistic regression was used to analyze the intention separately. For the integrated model with the first dose of vaccine of COVID-19, introducing the HBM variable in model 1 explained 33.98% of the variance (F = 398.71, p < .001), then upon adding the TPB variable in model 2, the explanation of variance increased to 41.93% (F = 491.94, p < .001) and parents' intention were associated with their perceived barriers, cues to action, and subjective norms. For the integrated model with the second dose of vaccine of COVID-19, introducing the HBM variable in Model 1 explained 23.76% of the variance (F = 68.82, p < .001), then upon adding the TPB variable in model 2, the explanation of variance increased to 26.67% (F = 77.24, p < .001), and parents' intention was associated with cues to action and subjective norms. The combination of the two theories improves the explanatory power of parents' intention to vaccinate their preschool children against COVID-19, and provides a basis for the development of effective interventions for vaccination of COVID-19 for preschool children.

A model of purchase intention of complementary and alternative medicines: the role of social media influencers' endorsements

BACKGROUND

Social Media Influencers (SMIs) are a fashionable way of marketing products by creating electronic word-of-mouth (e-WOM) on social media. The marketing of complementary and alternative medicines (CAMs) by SMIs is becoming increasingly popular and gaining credibility within consumers on social media platforms. Nonetheless, advising about healthcare products on social media should be examined as it is different from endorsing other kinds of commercial products. The aim of this study is to develop a model that provides the underlying mechanisms of the stimuli of SMIs on social media towards consumers' purchase intention of CAMs.

METHODS

This study used best fit framework synthesis methods to develop the model. A priori theory selection was conducted by identifying a BeHEMoTh strategy (Behavior of Interest, Health context, Exclusions and Models or Theories) to systematically approach identifying relevant models and theories relative to the research aim. Further evidence derived from primary research studies that describe the behavior identified is coded against selected a priori theory to develop the model.

RESULTS

This study presents a novel model for understanding the purchase behavior of CAMs using SMIs as a marketing strategy. The model included two well-known theories (theory of planned behaviour theory and source credibility theory) as well as extensive existing research from a multidisciplinary perspective. The model is exclusively designed to help identify elements affecting perceived source credibility and factors that have an influence over consumers' preferences to purchase CAMs by taking into consideration SMIs' endorsements.

CONCLUSIONS

This study provides unique insights introducing new research areas to health literature and offers, new roles for healthcare professionals in this digital era by gaining new skills and competencies required to provide more credible and accurate information about CAMs. The study also highlights the new marketing era of online health-related product endorsements and recommends that policymakers and researchers carefully evaluate the impact of SMI's on the use of CAMs, as well as to regulate the content of these promotional materials.

Intentions to Call a Helpline Among Targets of Intimate Partner Violence: The Role of the Theory of Planned Behavior and Gender Role Conflict

This research first aimed to test the Theory of Planned Behavior (TPB) as a model to understand the intentions to call a helpline of victimized males and females. A sample of 99 participants (53 males; 46 females) who were suffering violence at the time of participation were considered for analysis. Our results indicate that males and females' attitudes and subjective norms significantly predicted intentions. Second, this study aimed to measure Gender Role Conflict (GRC) in victimized men and test its association with TPB constructs. GRC occurs when rigid, sexist, or restrictive gender roles result in the restriction, devaluation, or violation of others or the self. Our results indicate that GRC was only negatively associated with perceived behavioral control. Additionally, in our sample of men who filled the GRC measure (n = 245), victimized men reported significantly higher GRC than non-victimized men. Overall, our findings indicate gender specificities in the intentions to call a helpline and suggest that GRC plays an important role in seeking help for men.

Decision-Making in Virtual Reality Sports Games Explained via the Lens of Extended Planned Behavior Theory

This study aims to determine whether the effect of interactivity on participation in virtual sports has risen because of the COVID-19 pandemic and if there is a difference in decision-making. The significance of social factors may be highlighted even more as a rationale for using virtual reality (VR) sports apps throughout the prolonged COVID-19 epidemic. A model was built based on the literature to describe the intention to participate in VR sports, and eight associated hypotheses were established. A sample of 301 submissions from a user poll on Korea's cycling information sharing website was used for our analysis. SPSS 23.0 (IBM, Armonk, NY, USA) and AMOS 18.0 (IBM, Armonk, NY, USA) were used to validate Hypotheses 1-8 using a multigroup structural equation model (SEM) analysis and multigroup analysis. Although some hypotheses were not validated, the impact of perceived interaction presented as an extra variable altered based on the group participating before and after the COVID-19 epidemic, and the study's goal was achieved. Given that information technology has evolved by overcoming physical space and socio-cultural constraints to create a society that connects people, the importance of online interaction, such as networking and competition between users, will be emphasized in the VR sports field in the future.

Self-Identity Matters: An Extended Theory of Planned Behavior to Decode Tourists' Waste Sorting Intentions

Waste sorting is a practical way of handling the garbage and an effective strategy for facilitating sustainable waste management. This research extended the theory of planned behavior (TPB) with self-identity and moral norms to predict waste sorting intentions in a heritage context of tourism. A total of 403 valid self-administrated questionnaires were achieved at a heritage destination in China. The results indicated that: (1) TPB variables (i.e., attitudes toward the behavior, subjective norms, and perceived behavioral control), self-identity, and moral norms were all directly and positively linked to tourists' waste sorting intentions, respectively; (2) self-identity indirectly influenced tourists' waste sorting intentions through the mediation of moral norms; and (3) the integrated model exhibited better predictive utility than any single model. This research contributes to the literature on waste management in the context of tourism by extending TPB with identity and personal normative constructs. It also provides practical implications for destination managers to leverage tourists' self-identity and moral norms for sustainable management.

Using the theory of planned behavior to predict parents' disclosure of donor conception to their children: a longitudinal study

STUDY QUESTION

Can the application of the theory of planned behavior (TPB) help predict heterosexual parents' disclosure of donor conception to their children?

SUMMARY ANSWER

Parents with a stronger will to act in accordance with social norms favoring disclosure were more likely to start the disclosure process within the next 5-9 years.

WHAT IS KNOWN ALREADY

In contrast to single mothers by choice and same-sex couples, heterosexual couples need to make an active decision to disclose their use of donor conception to their child. While disclosure at an early age is encouraged by international guidelines, many heterosexual-couple parents struggle with this. A previous study has found an association between parental scores of TPB factors and disclosure intention, but so far, no study has applied the TPB to predict parents' disclosure behavior.

STUDY DESIGN, SIZE, DURATION

The present study is based on the fourth and fifth waves of data collection (T4 and T5) in a nation-wide longitudinal study. Participating parents had conceived through identity-release oocyte donation (n = 68, response rate 65%) and sperm donation (n = 62, response rate 56%) as part of a heterosexual couple.

PARTICIPANTS/MATERIALS, SETTING, METHODS

The present study is part of the prospective longitudinal Swedish Study on Gamete Donation (SSGD). Consecutive recruitment of couples starting oocyte or sperm donation treatment was conducted at all seven fertility clinics providing gamete donation in Sweden during a 3-year period (2005-2008). Participants were requested to complete postal surveys at five time points. The present study includes heterosexual-couple parents following oocyte or sperm donation who participated at the two latest time points when their children were 7-8 years old (T4), and 13-17 years old (T5). At T4, participants completed the study-specific TPB Disclosure Questionnaire (TPB-DQ) measuring attitudes and intentions to disclose the donor conception to the child, and disclosure behavior was assessed at both T4 and T5. Data from those participants who had not yet disclosed at T4 were analyzed using survival analysis with Cox regressions.

MAIN RESULTS AND THE ROLE OF CHANCE

Forty participants had not disclosed the donor conception to their children at T4 and, out of these, 13 had still not disclosed at T5. We found a significant association between scores of the TPB factor Subjective norms at T4 and their subsequent disclosure behavior at T5 (HR = 2.019; 95% CI: 1.36-3.01). None of the other factors were significantly associated with disclosure behavior.

LIMITATIONS, REASONS FOR CAUTION

The present study concerns heterosexual-couple parents with children conceived following treatment with gametes from open-identity donors, which limits the generalizability of our findings to other groups and contexts. Other limitations include the risk of systematic attrition due to the longitudinal study design and decreased statistical power due to few participants.

WIDER IMPLICATIONS OF THE FINDINGS

Our findings highlight the importance of perceived subjective norms for parents' disclosure behavior and indicate that the co-parent's opinion about disclosure is of particular relevance in this regard. Counselors should focus on supporting prospective parents to initiate and maintain a healthy and open dialogue about concerns around building a family with donor conception.

STUDY FUNDING/COMPETING INTEREST(S)

The study was funded by the Swedish Research Council. The authors have no competing interests to declare.

TRIAL REGISTRATION NUMBER

N/A.

Predicting physical activity among adults with visual impairments using the theory of planned behavior

BACKGROUND

Using the theory of planned behavior (TPB), Haegele et al.1 created the beliefs of individuals with visual impairments about physical activity scale (BIVIPA-1) to examine individuals with visual impairments' (VI) motivation toward physical activity (PA). The overall factorial tenability of the BIVIPA-1 remains unclear due to its item configuration.

OBJECTIVE/HYPOTHESIS

The purposes of this cross-sectional study were to: (a) use confirmatory factor analysis to explore the structure of the expanded BIVIPA-2 and (b) test the predictive utility of TPB constructs on PA among adults with VI.

METHODS

Adults with VI (n = 236) completed the BIVIPA-2 and a multi-item PA recall instrument. A CFA was performed on the BIVIPA-2, and structural equation modeling was used to explore the relationship between theory constructs and PA.

RESULTS

The CFA results showed that the underlying structure of BIVIPA-2 was tenable for adults with VI based on TPB. Structural equation modeling showed limited support for the theorized predictive roles of theory variables on PA, as attitude predicted physical activity intention. Interestingly, subjective norm was a direct predictor for PA among adults with VI (β = 0.145).

CONCLUSIONS

TPB had limited predictive utility for physical activity among individuals with VI. The predictive relationship of subjective norms on PA may be somewhat unique to this population. Researchers may consider expanding the model to examine social support and subjective norms constructs and PA among individuals with VI.

Mothers' intention to vaccinate their daughters against human papillomavirus in NorthWest Ethiopia, using the theory of planned behavior

Human papillomavirus (HPV) is the second most common cause of cancer worldwide among females. HPV vaccination is highly protective against HPV infection and can reduce 56% of HPV infections. Therefore, the study aims to assess mothers' intention to vaccinate their daughters aged 9-14 years old against human papillomavirus in Debre Tabor town, Northwest Ethiopia, using the theory of planned behavior. A community-based cross-sectional study design was employed using the theory of planned behavior from November 1 to 30, 2022, in Northwest Ethiopia. A total sample of 449 study participants was enrolled. The study participants were selected using a multi-stage random sampling technique. Data was collected using an interview-administered questionnaire. The data was entered into EPI data version 4.6 and then, exported to SPSS version 23 for analysis. Those variables with a p-value <.05 with 95% CI were considered significant predictors. Mothers' positive intention to vaccinate their daughters aged 9-14 years against HPV was 67.5%. Attitude, perceived behavioral control, and subjective norm were significant predictors with (AOR = 10.09, 95% CI = 6.23-16.32), (AOR = 4.12, 95% CI = 2.71-6.26), and (AOR = 16.397, 95% CI = 9.69-27.748), respectively. Only two-thirds of mothers have a positive intention to vaccinate their daughters against human papillomavirus. Attitude, perceived behavioral control, and subjective norm were predictors. Therefore, it is better to do community mobilization toward the advantage of HPV vaccination.

Factors Contributing to Citizens' Participation in COVID-19 Prevention and Control in China: An Integrated Model Based on Theory of Planned Behavior, Norm Activation Model, and Political Opportunity Structure Theory

Chinese citizens' participation in COVID-19 prevention and control has made great contributions to the successful fight against the pandemic. The factors that have impacted citizens' participation have rarely been reported based on both social-psychological and political environmental theories. This paper presented a study to explore the determinants of Chinese citizens' participation in COVID-19 prevention and control based on a combined model of the theory of planned behavior, the norm activation model, and political opportunity structure theory. A dataset involving 463 respondents from Harbin in northeast China was acquired and analyzed. The results showed that the comprehensive model explained 62.9% of the total variance in citizens' participation behavior. The openness to public participation not only significantly directly influenced citizens' participation but also indirectly affected participation behaviors through attitude and perceived behavioral control, both of which were important mediators and had the greatest overall impacts. The awareness of consequences and subjective norms were crucial antecedents to the activation of other influencing factors. Personal norms indirectly affected participation behavior through the mediation of attitude. The empirical results showed the comprehensiveness, effectiveness, and high explanatory power of the postulated model. The study also provides both new theoretical perspectives for explaining public participation and useful practical implications for future policy development in promoting citizens' participation in public health emergency management.

Determining behavioral intention and its predictors toward preconception care use among reproductive age women in Arba Minch town, Southern Ethiopia, 2022: a cross-sectional study based on the theory of planned behavior

BACKGROUND

Preconception care is a highly effective, evidence-based intervention aimed at promoting the health of reproductive-age women and reducing adverse pregnancy-related outcomes. The Ethiopian Ministry of Health plans to integrate preconception care services into the country's existing healthcare system. However, women's preferences may be influenced by their values and customs. Therefore, this study used the theory of planned behavior to assess women's intention toward preconception care use and its predictors among reproductive-age women in Arba Minch town, southern Ethiopia.

METHODS

A community-based cross-sectional study was conducted in Arba Minch town from May 1 to 30, 2022. A simple random sampling technique was employed to select 415 study participants for data collection. Data were collected through a face-to-face interview using a pretested, structured questionnaire. Epi Data version 4.6 and SPSS version 26 were used for the entry and analysis of data, respectively. Multiple linear regression was performed to identify independent predictors of intention to use preconception care. The standardized β-coefficient was used as a measure of association. A P value of less than 0.05 was used to declare statistical significance.

RESULTS

This study had 415 participants, giving a response rate of 98.3%. The mean age of the participants was 28.4 (SD 5.18). The mean intention to use preconception care was 21.43 (SD 2.47). Direct perceived behavioral control (β = 0.263, p < 0.001), direct attitude (β = 0.201, p = 0.001), direct subjective norm (β = 0.158, p = 0.006), and age (β=-0.115, p = 0.023) were significant predictors of women's behavioral intention to use preconception care.

CONCLUSION

The study identified perceived behavioral control as the strongest predictor, followed by attitude and subjective norms, influencing the intention to use preconception care. These findings underscore the importance of integrating these predictors into health intervention programs aimed at promoting the implementation of preconception care services.

The effect of an educational intervention based on the theory of planned behavior on the prevention of knee osteoarthritis in women

Knee osteoarthritis offers significant opportunities for prevention and the mitigation of its severity and associated symptoms through lifestyle modifications. This study aimed to investigate the efficacy of an educational intervention based on the Theory of Planned Behavior (TPB) in promoting preventive behaviors against knee osteoarthritis among women aged over 40 years residing in Fars, Iran. This research utilized a quasi-experimental design. The study population comprised 100 women over the age of 40 who were registered at health centers in Fasa, Iran. Data were collected using a questionnaire based on the Theory of Planned Behavior (TPB). The intervention was implemented through eight educational sessions specifically designed to promote TPB-informed preventive behaviors against knee osteoarthritis. The findings revealed statistically significant differences between the experimental and control groups regarding their scores on attitude, subjective norms, perceived behavioral control, intention, and behavior, both before and after the intervention. At 3 months post-intervention, the experimental group demonstrated significant improvements in all measured constructs, while the control group showed no substantial changes. This study demonstrates that implementing structured educational interventions grounded in behavioral theory, specifically the Theory of Planned Behavior (TPB), can effectively promote preventive behaviors against knee osteoarthritis, thereby potentially reducing its associated morbidity.

Integrating the theory of planned behavior and the self-determination theory to promote Mediterranean diet adherence: A randomized controlled trial

The Mediterranean diet (MD) is one of the healthiest and most sustainable food regimes. Nevertheless, MD diffusion is still limited, emphasizing the need to understand the psychosocial factors that could predict and promote its adoption. Starting from an integrated model of Theory of Planned Behavior (TPB) and Self-Determination Theory (SDT), the present randomized controlled trial investigated the effect of manipulating motivation (autonomous vs. controlled) on intention and MD adherence behavior. Participants included 726 Italian adults randomly allocated to one of three conditions: autonomous motivation manipulation, controlled motivation manipulation, and control group. TPB variables were measured immediately after manipulation (T1), while MD adherence was evaluated 2 weeks later (T2). Results from multivariate analyses of variance highlighted that participants in the autonomous motivation condition reported higher intention and a more favorable cognitive attitude than control group participants. However, no change in behavior was found. Moreover, a path analysis with mediation effect showed that the impact of autonomous motivation condition versus control group on intention was mediated by cognitive attitude. Findings support the integration of TPB and SDT to encourage intention to adhere to the MD, also suggesting that prompting autonomous motivation may help to promote a greater diffusion of this healthy and sustainable dietary pattern.