SARS-CoV-2 Vaccination Rate and Associated Factors Among Patients with Mental Illness

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Songpon Lodthanong


Objective: To study the SARS-CoV-2 vaccination rate and associated factors among patients with mental illness

Methods: The cross-sectional study included subjects who were 12 years of age or more, diagnosed psychiatric disorders (ICD-10 : F1X-F7X), visited Trakan Phuet Phon hospital between July 2021, 30th and June 2022, 30th. The data were analyzed using percentage, mean, standard deviation, chi-square test and survival analysis.

Results: The 219 subjects were 178 subjects who were vaccinated within February 2022. The first-dose SARS-CoV-2 vaccination rate within November, December, January and February were 57.99%, 72.15%, 79.91% and 81.28%, respectively. The second dose rate were 46.58% , 54.79%, 64.38% and 71.23%, respectively. The third dose rate were 0.45% , 0.91%, 5.48% and 11.42%, respectively. The vaccination rate among patients with mental illness were lower than in the general population in Thailand and in the same province. Patients with substance-related disorders had the lowest rate of the first dose vaccination compare with others. The village health volunteers and PCU officers were the mainly approachable registered way of vaccination, 85.4% and the community hospitals were the main stations of vaccination too. Mostly, the first and second doses were CoronaVac (62.4%) and ChAdOx1-S (67.9%). No serious adverse reactions and mortality were observed. Associated factors of the first and second doses vaccination rate were handicapped-scheme group, the negative attitudes toward SARS-CoV-2 vaccination and unaware or unconcerned in COVID-19 infection.

Conclusion: In many aspects, the SARS-CoV-2 vaccination rates among patients with mental illness were lower than general population. Patients with substance-related disorders had the lowest rate of the first dose vaccination. Associated factors were handicapped-scheme group, the negative attitudes toward SARS-CoV-2 vaccination and unaware or unconcerned in COVID-19 infection. Prioritization of COVID-19 vaccination in patients with mental illness should be considered.

Article Details

How to Cite
Lodthanong, S. (2023). SARS-CoV-2 Vaccination Rate and Associated Factors Among Patients with Mental Illness. Journal of the Psychiatric Association of Thailand, 68(3), 276–286. Retrieved from
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