Table II.
Demographic and clinic characteristics: differences between control group women (CW) and study group women (SW)
| Variable | CW (n = 92) | SW (n = 83) | P-value |
|---|---|---|---|
| Age [years]a | 70 (66–71) | 72 (70–77) | < 0.0001 |
| BMI (Quetelet index [kg/m2])a | 24 (23.5–24.5) | 23.8 (22–24.5) | 0.0004 |
| Further educationa (years of education above 8th grade) | 6 (4–8) | 4 (3–4) | < 0.0001 |
| Current smokers (%)b | 10.87 [5.45–19.55] | 30.12 [20.50–40.95] | 0.0018 |
| Alcohol consumption (%)b: | |||
| Occasional | 7.61 [3.27–15.21] | 16.87 [9.65–26.49] | 0.0615 |
| Moderate | 3.26 [1.10–8.68] | 1.20 [0.02–6.01] | 0.3635 |
| Daily | 0.00 [0.00–4.34] | 0.00 [0.00–4.81] | n.a |
| FT4 [ng/dl]a | 1.2 (1.1–1.4) | 1.2 (1.1–1.35) | 0.7285 |
| NOx [μmol/l]a | 55.20 (44.18–58.23) | 101.23 (100.46–102.33) | < 0.0001 |
| MMSE [points]a | 30 [29–30] | 21 [20–24] | < 0.0001 |
| MMSE-PCA [points]a | 6 [6–6] | 2 [1–3] | < 0.0001 |
| KSb: | |||
| 0 | 95.65 [89.14–98.90] | 0.00 [0.00–4.81] | < 0.0001 |
| 1 | 4.35 [1.10–10.86] | 15.66 [8.45–25.29] | 0.0125 |
| 2 | 0.00 [0.00–4.34] | 33.73 [24.11–44.56] | < 0.0001 |
| 3 | 0.00 [0.00–4.34] | 50.60 [39.77–61.43] | < 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.