[Drinking behaviors of adults at different time of day in four cities of China in summer].

Objective: To investigate the drinking behaviors of adults at different time of day in four cities of China in summer.

Methods: A total of 1483 adults aged 18 - 60 years old from Beijing, Shanghai, Chengdu and Guangzhou were selected using multiple-stage random sampling method. The information of amounts and types of daily drinking water was recorded by subjects for seven consecutive days using a quantitative measurement.

Fluid intake of adults in four Chinese cities.

To investigate the fluid intake and knowledge on water and health in Chinese adults, and to provide a scientific basis for the development of adequate water intake values for people in China. A total of 1,483 adults aged 18-60 years were selected from four provincial capital cities using a multiple-stage random sampling method. The information on the amounts and types of daily fluid intake was collected using a 24-h fluid intake record for 7 consecutive days.

[Food water sources analysis of adults in four cities of China in summer].

Objective: To investigate the food water sources of adults in the four cities of China in summer.

Methods: A total of 64 adults aged 18 - 60 yrs from four cities (Beijing, Shanghai, Chengdu and Guangzhou)were selected using convenient sampling method. The food samples were collected by using duplicate portion method and the water content of food samples were determined by using the national standard.

[Water intake sources analysis of adults in four cities of China in summer].

Objective: To investigate the water intake sources of adults in the four cities of China in summer.

Methods: A total of 64 adults aged 18 - 60 yrs from the four cities (Beijing, Shanghai, Chengdu and Guangzhou) were selected using convenient sampling method. The information on amounts and types of daily drinking water was recorded by subjects for three consecutive days using a quantitative measurement.

[Knowledge on drinking water of adults in four cities of China].

Objective: To understand the status on knowledge of drinking water among adults aged 18 - 60 yrs in Beijing, Shanghai, Chengdu and Guangzhou of China.

Methods: A total of 1483 adults aged 18 - 60 yrs from the four cities (Beijing, Shanghai, Chengdu and Guangzhou) were selected using multiple-stage random sampling method. The information was collected by face-to-face interview.

[Water intake of adults in four cities of China in summer].

Objectives: To investigate total drinking water intake of adults in the four cities of China in summer.

Methods: A total of 1483 adults aged 18 - 60 yrs from Beijing, Shanghai, Chengdu and Guangzhou were selected using multiple-stage random sampling method. The information of amounts and types of daily drinking water was recorded by subjects for seven consecutive days using a quantitative measurement.