Rectus abdominis muscle thickness predicts metabolic syndrome in middle-aged males
Rectus abdominis muscle thickness at the umbilical level (RAM) is significantly associated with metabolic syndrome in middle-aged males, a recent study from Korea has shown.
Computed tomography (CT) images at the umbilicus level were taken for 725 middle-aged Korean males, of which 251 had metabolic syndrome (MS; mean age 48.8±6.1 years) while the remaining 474 did not (mean age 49.5±6.5 years).
Images showed that RAM was significantly thinner for the patients with MS than for those without (2.46±0.01 vs 2.52±0.01; p<0.01).
Moreover, patients who had more MS components had significantly thinner RAM (p<0.01 for trend). Those with three or more MS components had significantly thinner RAM than those without any diagnostic criteria (2.46±0.01 vs 2.55±0.02; p<0.01). Patients meeting two or less MS criteria also had significantly thicker RAM than those with at least three criteria (p<0.01).
Stepwise multiple regression showed that RAM was an independent factor significantly correlated with MS (odds ratio, 0.860; 95 percent CI, 0.767 to 0.965; p=0.01) after adjusting for covariates such as total cholesterol, fasting glucose and creatinine.
Partial correlation showed that RAM was significantly positively correlated with body mass index (p<0.01), creatinine (p<0.01) and skeletal muscle index (p<0.01). On the other hand, significant negative correlations with RAM were observed for age (p<0.01), waist circumference (p<0.01), fasting glucose (p<0.01) and triglycerides (p<0.01).
Participants were recruited from the Health Promotion Centre of the Chung-ang University Hospital. Anthropometric and laboratory measurements, and CT images were obtained from the participants. Non-Koreans were excluded from the study.