[Estimation on the intangible cost and influencing factors for patients with hepatitis B-related diseases].

Objective: To estimate the intangible cost and associated factors on patients with hepatitis B-related diseases, so as to explore the differences of the three elicitation techniques on the 'willingness to pay approach' (WTP).

Methods: Face-to-Face interviews were conducted to collect health economics-related information by trained investigators, using a structured questionnaire. WTP was employed to estimate the intangible cost while an open-ended question format, together with iterative bidding game and payment card were respectively used to elicit WTP for the hypothetical cure of hepatitis B-related diseases.

Comparison of body mass index with body fat percentage in the evaluation of obesity in Chinese.

Objective: To evaluate the present Chinese body mass index (BMI) criteria with body fat percentage (BF%) in determining obesity in Chinese population.

Methods: A total of 4 907 subjects (age: 20-90 yrs) were enrolled in the baseline survey of a longitudinal epidemiological study, and 2 638 of them were reevaluated in 5.5 years later.