2.1 Prevalence of subjects
As shown in Table 14,766 adults were included in this study, including 2,535 males and 2,231 females. The average age of the included patients was 47.8 ± 10.2 years (age range: 18-89 years). 15.2% of men and 33.6% of women had Mets, 37.1% of men and 18.9% of women had MetS. The prevalence of MetS was higher in men (69.1%) than in women (30.9%). 4.2% were underweight, 56.7% were normal weight, 31.2% were overweight and 8.0% were obese. Among them, male accounted for 68.7% and female accounted for 31.3% of overweight population, while male accounted for 79.7% and female accounted for 20.3%. In general, 1,362 out of 4,766 people can be diagnosed with MetS, accounting for 28.6% of the total number. Among them, men are higher than women, older people are higher than younger ones, overweight people are higher than normal weight.As shown in Figure 1A, all patients were grouped by age. The prevalence of MetS was different among different age groups. The prevalence of MetS increased with age. The statistical differences were mainly before and after 50 years old (P < 0.05).As shown in Figure 1B, all patients were grouped by BMI, and the prevalence of MetS was different among different weight groups. The prevalence of MetS increased with weight gain, and the difference between any two groups was statistically significant (P < 0.05).
2.2 The prevalence of MetS and diagnostic criteria was compared among different ages and genders.
Table 2 shows the prevalence of MetS and diagnostic criteria among different ages and genders. In general, the 5 abnormal Mets indicators were: waist circumference accounted for 51.8%, triglyceride accounted for 32.5%, HDL-C accounted for 37.0%, blood pressure accounted for 35.4%, blood glucose accounted for 12.0%. Under 60 years old, men's waist circumference and triglyceride exceeding standard rates were higher than those of women, and there were significant differences, but over 60 years old, the difference was not statistically significant; although the difference of blood pressure between men and women in different age groups was statistically significant, but under 60 years old, the over standard rate of men was higher than that of women, for over 60 years old, the incidence of hypertension in women gradually exceeded that of men under the age of 30, there was no significant difference in the rate of exceeding the standard between men and women, 30-60 years old, men were higher than women, and the difference was statistically significant.
2.3 Comparison of age and body composition between different genders
According to the comparison of body composition with and without Mets by gender (see Table 3), it can be concluded that body mass index (BMI), waist hip ratio (WHR), waist height ratio (WHtR), body fat rate (PBF), basal metabolic rate (BMR), visceral fat area (VAT), skeletal muscle mass index (SMI), fat mass index (FMI), fat mass index (FMI) and non adipose tissue of people with MetS compared with those without MetS The quality index (FFMI) was higher, SF ratio was lower, and the difference was statistically significant.
2.4 OR and 95% CI of MetS related indicators
Table 4 shows the OR value and 95% CI of each influencing factor related to Mets obtained by logistic regression model. The relationship between MetS and overweight related measurement indexes and body composition was similar in different genders. With the increase of body mass index, waist hip ratio, waist height ratio, body fat rate, basal metabolic rate, visceral fat area, skeletal muscle mass index, fat mass index and non adipose tissue mass index, the risk of MetS in men and women increased, while the risk of MetS decreased with the increase of SF ratio.
2.5 Critical values of body composition indices related to Mets
The area under ROC curve (AUC), critical value, and corresponding sensitivity and specificity of each influencing factor related to MetS in different genders are shown in Table 5. The AUC of most influencing factors was greater than 0.7, and the sensitivity of most critical values was greater than 0.7.