Table III.
Differences in demographic and clinical variables between study men (SM) and control men (CM)
| Variable | CM (n = 90) | SM (n = 80) | P-value |
|---|---|---|---|
| Age [years]a | 70 (67.25–73) | 71 (70–73) | 0.0035 |
| BMI (Quetelet index [kg/m2])a | 24 (23–24.5) | 24.5 (24–25) | 0.0002 |
| Further educationa (years of education above 8th grade) | 7 (4–8) | 4 (3–6) | < 0.0001 |
| Current smokers (%)b | 20.00 [12.23–29.99] | 42.50 [31.27–53.73] | 0.0018 |
| Alcohol consumptions (%)b: | |||
| Occasional | 17.78 [10.01–26.65] | 12.50 [6.27–21.23] | 0.3411 |
| Moderate | 8.89 [3.35–16.65] | 10.00 [3.77–18.73] | 0.8049 |
| Daily | 2.22 [0.01–7.76] | 5.00 [1.27–12.48] | 0.3282 |
| FT4 [ng/dl]a | 1.2 (1.1–1.38) | 1.2 (1.1–1.33) | 0.9344 |
| NOx [μmol/l]a | 41 (39–42) | 81.5 (80–85.25) | < 0.0001 |
| MMSE [points]a | 30 [29–30] | 23 [21–24] | < 0.001 |
| MMSE-PCA [points]a | 6 [6–6] | 2 [1–3] | < 0.0001 |
| KSb: | |||
| 0 | 94.44 [87.79–97.77] | 0.00 [0.00–4.98] | < 0.0001 |
| 1 | 5.56 [2.24–12.21] | 36.25 [26.27–47.48] | < 0.0001 |
| 2 | 0 [0.00–4.43] | 42.50 [31.27–53.73] | < 0.0001 |
| 3 | 0 [0.00–4.43] | 21.25 [12.52–31.23] | < 0.0001 |
BMI – body mass index
a
median (Q1–Q3), Q1 = 25th percentile; Q3 = 75th percentile; Mann-Whitney test
b
% [95% CI], CI – confidence interval [lower bound–upper bound]; Z test for proportions.