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Impact of Community-Based Substance Use Screening on Substance Use Disorder Detection among Adults in Nigeria

Abstract

Substance use and substance use disorders constitute an important public health concern among adults in Nigeria and may contribute to physical and mental health problems, family difficulties, occupational impairment, accidents, injuries, financial hardship, and reduced social functioning. The use of alcohol, tobacco, cannabis, opioids, stimulants, sedatives, and other psychoactive substances may develop into problematic patterns that remain undetected when individuals do not seek professional assistance. Stigma, fear of discrimination, limited awareness, financial constraints, geographical barriers, and inadequate access to specialized mental health and addiction services may further contribute to delayed detection and treatment. Community-based substance use screening provides an opportunity to identify adults with potentially harmful patterns of substance use through community outreach programmes, primary healthcare centres, community health initiatives, mobile services, and other accessible platforms. Early detection may facilitate brief interventions, counselling, risk-reduction education, comprehensive assessment, treatment referral, and appropriate follow-up. However, inadequate screening coverage, limited availability of trained personnel, concerns about confidentiality, stigma, insufficient referral services, and weak follow-up mechanisms may limit the effectiveness of community-based substance use screening in Nigeria. Against this background, this study investigates the impact of community-based substance use screening on substance use disorder detection among adults in Nigeria. The study will be anchored on the Health Belief Model, Social Ecological Model, and the Health Systems Framework. The Health Belief Model explains how adults' perceptions of susceptibility to substance-related problems, perceived severity, perceived benefits of screening, perceived barriers, and cues to action may influence participation in community-based substance use screening. The Social Ecological Model emphasizes the influence of individual, family, peer, community, socioeconomic, cultural, and environmental factors on substance use behaviour, healthcare-seeking practices, stigma, and access to treatment services. The Health Systems Framework emphasizes service delivery, health workforce, health information, medical products and technologies, financing, and accessibility as essential components of effective community-based substance use screening, referral, and treatment programmes. Collectively, these theoretical perspectives provide a suitable framework for explaining how community-based substance use screening may influence substance use disorder detection among adults in Nigeria. The study will adopt a quantitative cross-sectional analytical or quasi-experimental research design. The study population will comprise adults aged 18 years and above residing in selected communities across Nigeria. A multistage sampling technique will be used to select states, local government areas, communities, households, and eligible adults. Community-based substance use screening will be measured using indicators such as availability of screening services, screening coverage, frequency of screening activities, use of validated substance use screening instruments, assessment of alcohol and other substance use patterns, assessment of frequency and quantity of use, identification of substance-related problems, availability of trained healthcare personnel, confidentiality arrangements, substance use education, brief intervention services, and referral systems. Substance use disorder detection will be assessed using indicators such as positive screening results, problematic or hazardous substance use patterns, substance-related functional impairment, symptoms suggestive of substance use disorder according to an appropriate diagnostic framework, newly identified cases, severity of identified substance-related problems, referrals for comprehensive assessment, clinical confirmation where appropriate, and linkage to counselling, treatment, rehabilitation, or other support services. Data will be collected using structured questionnaires, community screening registers, validated screening tools, healthcare facility records, referral registers, and relevant community health programme documents. Descriptive statistics will be used to summarize participants' characteristics, substance use patterns, screening coverage, and substance use disorder detection findings. Inferential statistical techniques, including chi-square tests, correlation analysis, and logistic or multiple regression analysis, will be used to determine the impact of community-based substance use screening on substance use disorder detection. Where appropriate, substance use disorder detection rates before and after implementation of community-based screening activities may be compared to determine changes associated with the intervention. Diagnostic tests will also be conducted to assess the reliability, validity, and robustness of the findings. The study is expected to find that community-based substance use screening has a significant positive impact on substance use disorder detection among adults in Nigeria. Adults who participate in community-based substance use screening are expected to have a higher likelihood of having previously unrecognized problematic substance use or substance use disorder identified than adults without access to such services. Community-based screening may facilitate early recognition of harmful patterns of substance use and provide opportunities for brief intervention, counselling, risk-reduction education, comprehensive assessment, and referral to appropriate treatment services. Bringing screening services closer to communities may reduce geographical, financial, and time-related barriers and reach adults who may be reluctant to seek specialized addiction services because of stigma or fear of discrimination. Community-based health education may also improve awareness of the signs of problematic substance use, health consequences, available treatment options, and the importance of seeking professional support. Confidential and non-judgmental screening environments may further encourage individuals to disclose substance use patterns and participate in appropriate care. Conversely, stigma, concerns about confidentiality, inadequate screening coverage, shortage of trained personnel, limited treatment facilities, financial barriers, and weak referral and follow-up systems may reduce the effectiveness of community-based substance use screening. The study therefore expects accessible and well-organized community-based substance use screening to contribute significantly to improved detection and early management of substance use disorders among adults in Nigeria. The study is expected to contribute to the literature on community-based substance use screening, substance use disorder detection, addiction prevention, mental health, adult health, community health services, preventive healthcare, behavioural health, and public health in Nigeria. The findings will provide useful information to the Federal Ministry of Health and Social Welfare, National Primary Health Care Development Agency, National Drug Law Enforcement Agency, state ministries of health, primary healthcare centres, mental health and addiction treatment facilities, healthcare providers, psychologists, psychiatrists, community health workers, development partners, and policymakers regarding strategies for improving early detection and management of substance use disorders. The study will also provide evidence-based recommendations for expanding community-based substance use screening programmes, increasing public awareness, reducing stigma, improving confidentiality and privacy during screening, strengthening training of healthcare workers, increasing access to counselling and treatment services, strengthening referral and follow-up systems, and integrating substance use screening into appropriate community-based mental health and primary healthcare programmes across Nigeria.

Keywords: Community-based substance use screening, substance use disorder detection, adults, substance use, addiction, mental health, community health services, preventive healthcare, substance abuse prevention, behavioural health, Nigeria, public health.