I need to know what the independent variable and variable ty

I need to know what the independent variable and variable type, dependent variable and variable type, and covariate and variable type is in this study.

Chinese Medical Journal 2012;125(3):481-485 481

Original article

Cancer risk and key components of metabolic syndrome:

a population-based prospective cohort study in Chinese

CHEN Wei, LU Feng, LIU Si-jun, DU Jiang-bo, WANG Jian-ming, QIAN Yun, SHEN Chong,

JIN Guang-fu, HU Zhi-bin and SHEN Hong-bing

Keywords: cancer risk; metabolic components; metabolic syndrome; risk factors; cohort study

Background The key components of metabolic syndrome (MS) are waist circumference, blood pressure, fast blood glucose, high density lipoprotein cholesterol (HDL-c) and triglycerides (TG). These components have, separately and jointly, been associated with an increased risk of cardiovascular diseases. In this study, we aimed to explore the association between MS components and cancer risk in a population-based cohort in China.

Methods We established a population-based cohort with 17 779 individuals aged 35 and above at baseline in 2004 and 2005 in Changzhou, Jiangsu Province, China. All participants were face-to-face interviewed to complete a questionnaire and were accepted physical examinations including blood tests for glucose and lipids and physical measurements for obesity and blood pressure. In 2009, a total of 16 284 subjects (6886 men and 9398 women, 91.6%) attended the flow-up interviews and the participants or their family members reported all the hospitalizations and diseases including cancer occurred during the follow-up period. Multivariate Cox regression was used to estimate the hazard ratios (HRs) of metabolic syndrome components and cancer incidence.

Results There was a dose-response association between cancer risk and the number of MS components presented at baseline (P for trend=0.012) and the HR (95% confidence interval (CI)) was 2.63 (1.27

Solution

The dependent variable is cancer risk , It is a continous variable.

The independent variable are the MS components; WC, blood pressure, fast blood glucose, HDL-c and TG. They are all dichotomous, categorical variables in the expection of blood pressure (systolic blood pressure ?130 mmHg or diastolic blood pressure ?85 mmHg or treatment of previously diagnosed hypertension) which is ordinal .

The covariates are Age, BMI, Smoker, Drinker, Family History, Income, Education, Occupation and Physical Activity. Age and BMI are continous variables, Smoker, Family History and Drinker are dichotomous variables. Income, Education, Occupation and Physical Activity are ordinal variables.