Total Female Male P valuea
Number 169 7 162  
Age (year) 49.22 ± 9.34 50.86 ± 6.44 47.15 ± 9.45 0.523
Fasting Triglyceride (mg/dL) 145.42 ± 118.77 87.29 ± 56.95 147.93 ± 120.19 0.187
Total Cholesterol (mg/dL) 202.96 ± 34.66 220.43 ± 36.51 202.20 ±  34.50 0.174
HDL (mg/dL) 51.02 ± 11.62 70.50 ± 8.68 50.18 ± 11.00 <0.001**
Waist Circumference (cm) 83.83 ± 8.30 68.71 ± 7.89 84.49 ± 7.69 <0.001**
Blood Pressure (mmHg)        
Systolic 124.04 ± 14.34 110.71 ± 16.91 124.61 ± 14.00 0.012*
Diastolic 77.78 ± 11.74 68.86 ± 9.92 78.17 ± 11.69 0.040*
Metabolic syndrome       0.68
yes 43 1 42  
no 126 6 120  
Fasting plasma glucose (mg/dL) 104.06 ± 20.89 95.57 ± 6.63 104.43 ± 21.22 0.273
Fasting Insulin Level (µU/mL) 8.73 ± 6.67 6.34 ± 2.42 8.83 ± 6.77 0.336
HOMA-IR 2.27 ± 1.82 1.51 ± 0.67 2.31 ± 1.85 0.26
HL512 (dB)        
Year 2002 15.22 ± 5.32 13.81 ± 1.59 15.28 ± 5.42 0.477
Year 2012 15.36 ± 7.74 12.14 ± 3.60 15.50 ± 7.85 0.262
shift 0.15 ± 5.34 -1.67 ± 3.26 0.23 ± 5.61 0.378
HL468 (dB)        
Year 2002 21.58 ± 15.04 13.10 ± 3.36 21.95 ± 15.24 0.128
Year 2012 28.90 ± 17.79 14.88 ± 6.93 29.50 ± 17.88 0.01*
shift 7.31 ± 7.08 1.79 ± 6.55 7.55 ± 7.02 0.034*
a: the p values were obtained by t tests, except the metabolic syndrome, which was obtained by Fisher exact test.
*: p level <0.05
**: p level <0.01
Table 1: Descriptive Characteristics of the population in this study.