Climate Health Knowledge and Gaps in an Online Convenience Sample Coordinated From Fountain University, Nigeria.

The knowledge of specific climate-health pathways may differ from general awareness of climate change. This study was aimed to describe climate-health knowledge, identify item-level gaps and explore demographic differences in an online convenience sample coordinated from Fountain University, Nigeria. This cross-sectional analysis included 514 complete final-format responses collected through Google Forms from 2 June to 18 July 2026. Fifteen positively keyed items were scored 1 for Yes and 0 for No or Not sure. Descriptive statistics, internal consistency and exploratory non-parametric comparisons were calculated. Respondents were predominantly aged 18-25 years (97.1%), male (82.3%) and students (93.8%). The mean score was 12.09/15 (standard deviation 3.50; 95% confidence interval 11.79-12.40); Kuder-Richardson 20 was 0.873. A ceiling effect was evident: 39.3% scored 15/15. Correct responses were highest for disaster-related stress (93.8%) and flooding and cholera (92.6%), and lowest for warmer seas and harmful bacteria (70.2%), urban heat islands (70.6%) and crop nutritional quality (71.6%). High overall scores coexisted with specific knowledge gaps. Findings support evaluating targeted, locally relevant education in comparable groups. Convenience sampling, sample imbalance and incomplete instrument-validation evidence preclude national estimates or claims of comprehensive climate-health literacy.