[Application of statistics on chronic-diseases-relating observational research papers].

Objective: To study the application of statistics on Chronic-diseases-relating observational research papers which were recently published in the Chinese Medical Association Magazines, with influential index above 0.5.

Methods: Using a self-developed criterion, two investigators individually participated in assessing the application of statistics on Chinese Medical Association Magazines, with influential index above 0.

[Study on knowledge, attitudes and use of the pre-packaged food nutrition labeling in Hangzhou supermarket consumers in 2010].

Objective: To study the prevalence rates of knowledge, attitudes and use of the nutrition labeling and related influential factors in Hangzhou supermarket consumers.

Methods: Using a self-developed survey questionnaire, randomly selected customers were conducted a face-to-face interview program in a large supermarket of Hangzhou city.

Results: 586 people were interviewed, including 202 males and 384 females, with the mean age as 41.

[Development and evaluation of complex intervention].

Experimental studies with only one intervention are not always sufficient for health care issues, while the method of complex intervention is more useful. But the complex intervention is more complicated and needs carefully design and evaluation. This article will introduce the framework for design and evaluation of complex intervention and the revised version made by Medical Research Council, with five examples showing its application.