Objective To investigate the asthma and the risk factors in the greenhouse-vegetable planter in Tangshan, Hebei province. Methods 1604 planter were chosen by cluster sampling and were investigated by questionnaire according to the standard of Chinese Medical Asthma Association (2003) during Jan.-June, 2006. Results 42 asthma patients were diagnosed, the prevalence rate was 2.62%, 1.78% in the male and 3.42% in the female. The family history, history of allergic diseases, upper respiratory path infection, smoking, kind of plant, pets were the risk factors. Conclusion The prevalence of asthma in the greenhouse-vegetable planters in Tangshan is related to the family history, history of allergic diseases, upper respiratory path infection, smoking, kind of plant, breed pets and working time.

Objective To explore the positive affect of dementia caregivers.Methods Questionnaire method was used to investigate seventy-six dementia caregivers (the dementia group)and seventy-six non-dementia caregivers(the control group).Results The total score and the score of each dimension in the dementia group was significantly lower than those got from the control group.Conclusions Dementia caregivers can feel the positive affect from dementia patients.Compared with non-dementia caregivers,dementia caregivers feel lower positive affect,especially positive feedback from dementia patients.