The development model of the elderly’s health service system towards the excellence of tertiary hospitals attached to the Royal Thai Navy used the mixed quantitative and qualitative research and aimed to 1) Study the elderly’s health service system of tertiary hospitals attached to the Royal Thai Navy 2) Compare the quality of life and demand of health service of the elderly with different abilities of daily living and seeking services of the tertiary hospitals in different areas and 3) Synthesize the development model of the elderly’s ...