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Table 1 General characteristics of subjects at baseline (2006)

From: Comparisons of hearing threshold changes in male workers with unilateral conductive hearing loss exposed to workplace noise: a retrospective cohort study for 8 years

  Group (N = 78) Distribution Mean SDa
Age (years) <50 (40–49) 42 (53.85 %) 48.7 2.9
≥50 36 (46.15 %)
Working period (years) 20–29 43 (55.13 %) 29.8 2.7
≥30 35 (44.87 %)
Body mass index (BMI) (kg/m2) <20.0 1 (1.28 %) 23.3 1.8
20.0–22.9 28 (35.90 %)
≥ 23.0 49 (62.82 %)
Systolic blood pressure (mmHg) <120 17 (21.79 %) 125.9 12.5
120–139 50 (64.10 %)
≥ 140 11 (14.10 %)
Fasting blood sugar (mg/dL) <100 37 (47.44 %) 102.8 17.7
100–125 36 (46.15 %)
≥ 126 5 (6.41 %)
Total cholesterol (mg/dL) <200 52 (66.67 %) 189.3 31.2
200–229 19 (24.36 %)
≥ 230 7 (8.97 %)
Smoking status Non-smoker 64 (82.05 %) - -
Smoker 14 (17.95 %)
Noise level (dBA) < 85 (73.5–84.9) 53 (67.95 %) 83.5 5.0
≥ 85 25 (32.05 %)
  1. a SD standard deviation