[Multi-correspondence analysis of the status and related factors of chronic diseases multimorbidity in middle-aged and elderly people in China in 2009].

OBJECTIVE

To study the status of chronic disease multimorbidity of middle-aged and elderly people over 45 years old in China, and to analyze the influencing factors.

METHODS

Using the data of the"China Health and Nutrition Survey(CHNS)", this survey has been carried out in 10 rounds nationwide since 1989. Multi-stage cluster random sampling was used to investigate rural and urban areas in 9 provinces and cities in China. In this study, the general socio-demographic characteristics, disease history, living habits and other information in the 2009 database were used to analyze the subjects who were collected blood samples. The prevalence of 8 common chronic diseases and multimorbidity such as hypertension, mixed-hyperlipidemia and hyperuricemia were described respectively. The Venn diagram in the R software package was used to calculate the multimorbidity of the disease. The χ~2 test and multiple correspondence analysis were used to explore the influencing factors of chronic disease multimorbidity in the middle-aged and elderly people in China.

RESULTS

Among the 5316 subjects, the highest prevalence among 8 chronic diseases was hypertension(2143, 40. 3%). The lowest prevalence was myocardial infarction(87, 1. 4%). There were all together 1498 patients who had two kinds or more than two kinds of chronic diseases with a detection rate of 28. 18%. The most common multimorbidity were hypertension+hyperuricemia(199, 13. 30%), followed by hypertension + mixed-hyperlipidemia(191, 12. 77%). Hypertension+hyperuricemia+mixed-hyperlipidemia was the most common combination of the three chronic diseases(103, 6. 89%). Age(Kendull=0. 158, P<0. 001), region(χ~2=30. 129, P<0. 001), BMI(Kendull=0. 344, P<0. 001) and marital status(χ~2=21. 923, P<0. 001) were associated with the number of multimorbidities. Correspondence analysis showed that subjects aged 65 to 74, living in cities and sleeping less than 7 hours were more likely to have multimorbidity.

CONCLUSION

The prevalence of chronic disease multimorbidity among middle-aged and elderly residents in China is high. Older age, unmarried, overweight and obesity, too little or too much sleep may increase the risk of multimorbidity.