Table 1. Distribution of study subjects according to presence of NIH-IV Prostatitis and selected factors.
| Variables* | No Prostatitis | Prostatitis | P-value |
| n = 1474 | n = 394 | ||
| Age (yrs) | 40.52 (0.30) | 42.36 (0.58) | 0.005 |
| Cigarette smoking (%) | 0.008 | ||
| Smokers<15 Pack-years | 23.70 | 22.10 | |
| Smokers≧15 Pack-years | 23.40 | 31.00 | |
| Alcohol drinking (%) | 0.03 | ||
| drinkers<1 drinks/week | 21.90 | 18.30 | |
| drinkers ≧ 1 drinks/week | 48.70 | 56.10 | |
| Education of college or above (%) | 57.50 | 52.50 | 0.08 |
| Physical activity (%) | 49.30 | 48.20 | 0.71 |
| Body mass index(kg/m2) | 24.01 (0.08) | 23.90 (0.16) | 0.57 |
| Obesity (%) | 11.70 | 10.90 | 0.65 |
| Systolic blood pressure (mmHg) | 123.41 (0.40) | 123.72 (0.77) | 0.72 |
| Diastolic blood pressure (mmHg) | 80.50 (0.25) | 80.56 (0.49) | 0.90 |
| Hypertension (%) | 22.00 | 23.10 | 0.68 |
| Serum total cholesterol (mmol/L) | 5.46 (0.02) | 5.51 (0.05) | 0.32 |
| Serum high density lipoprotein cholestero (mmol/L) | 1.29 (0.007) | 1.30 (0.14) | 0.79 |
| Serum low density lipoprotein cholesterol (mmol/L) | 2.82 (0.02) | 2.82 (0.04) | 0.97 |
| Serum triglycerides (mmol/L) | 1.92 (0.04) | 1.92 (0.10) | 0.99 |
| Dyslipidemia (%) | 43.50 | 42.60 | 0.77 |
| Plasma glucose(mmol/L) | 4.97 (0.03) | 5.02 (0.07) | 0.49 |
| Diabetes (%) | 4.20 | 4.80 | 0.57 |
*
Mean (standard error) or percentage.