To evaluate a potential protective effect of fruit and vegetable consumption on the occurrence of colon cancer. Data on the per capita consumption of vegetables and fruits for all counties in the European Common Market is available, as well as age-adjusted colon cancer incidence rates for each of those counties.  

Pelvic girdle pain is a common problem during pregnancy. For most women, the symptoms cease within the first 3-6 months of giving birth, but in some women the pain persists. In this study we investigate the sexuality and frequency of depressive symptoms in women with persistent pelvic girdle pain after childbirth and in healthy women. The study identified 46 women with persistent pelvic girdle pain and 39 healthy women. The frequency of depressive symptoms and sexuality were measured using the self-rating version of the Montgomery-Asberg Depression Rating Scale and the McCoy Female Sexuality Questionnaire.

What type of study\'s are these: