Background The objective of this study was to compare prevalence and associated factors of hypertension between ship officers and In-land officers of the Royal Thai Navy.

Method This was an analytic cross-sectional study of 670 naval ship officers and 647 In-land officers in Sattahip district, Chonburi province. Data was collected by self-administered questionnaires. The blood pressure was measured and recorded by medical personnel. Data were analysed by descriptive statistics. The prevalence of hypertension were compared by proportion test. The associated factors were analysed by multiple logistic regression.

Result Prevalence of hypertension in ship officers was 31.2 percent, statistically less than prevalence of hypertension in In-land officers which was 41.1 percent (95% CI −0.15,–0.04). The associated factors of hypertension were age (Adjusted Odds ratio=1.09; 95% CI 1.03, 1.15) and BMI (Adjusted Odds ratio=1.26; 95% CI 1.11, 1.42).

Discussion and Conclusion The prevalence of hypertension among ship and In-land officers were associated with increasing age and BMI rather than the difference of working unit. Thus, health promotion program for navy officers should emphasise on weight control especially in elder officers.