Table 1.
Characteristics of the study population.
| Characteristics | All | MCI | Normal cognition | Statistical test between MCI and normal cognition |
|---|---|---|---|---|
| Sex: Male/Female, n | 22/56 | 9/15 | 13/41 | p = 0.3454 |
| Hypertension, n | 38 | 15 | 23 | p = 0.1682 |
| Type 2 Diabetes, n | 12 | 4 | 8 | p = 0.8343 |
| Race: White/Black or AA, n | 67/11 | 20/4 | 47/7 | p = 0.9352 |
| BMI | 27.29 (5.12) | 26.76 (5.37) | 27.71 (5.14) | p = 0.4684 |
| MMSE score | 28.41 (1.43) | 27.71 (1.55) | 28.74 (1.23) | p = 0.0064 |
| Age, years | 69 (7.18) | 71.5 (7.25) | 67.72 (6.96) | p = 0.0352 |
| Years of education, years | 15.6 (2.45) | 14.13 (2.03) | 16.20 (2.40) | p = 0.0002 |
| Hypercapnic CVR in gray matter, %/mmHg | 2.22 (0.71) | 2.09 (0.76) | 2.27 (0.68) | p = 0.3110 |
| Hypercapnic CVR in white matter, %/mmHg | 1.94 (0.75) | 1.76 (0.74) | 2.03 (0.75) | p = 0.1380 |
| Baseline CBF in gray matter, mmHg | 35.87 (9.66) | 33.42 (6.88) | 36.97 (10.54) | p = 0.0816 |
| Baseline CBF in white matter, mmHg | 19.75 (6.03) | 18.73 (4.28) | 20.20 (6.64) | p = 0.2460 |
Values are means (s.d.) or numbers. Chi-squared test and t-test were used for categorical variables and quantitative variables, respectively, for statistical tests between mild cognitive impairment (MCI) and normal cognition groups.