Table 1.
Sample Characteristics and Mean Performance on Cognitive Measures for African American Men.
| Total (N = 257) M (SD) |
CAATSA (n = 155) M (SD) |
PCA (n = 102) M (SD) |
|
|---|---|---|---|
| Age (years) | 58.15 (16.15) | 50.85 (15.63) | 69.24** (9.07) |
| range = 22–84 | range = 22–84 | range = 51–91 | |
| Married, % | 44 | 61.3 | 17.6** |
| Education (years completed) | 11.78 (3.47) | 12.25 (3.56) | 11.08* (3.22) |
| Self-reported hypertension, % | 54.9 | 41.3 | 75.5** |
| Self-reported diabetes, % | 21.8 | 16.8 | 29.4* |
| Systolic blood pressure (mm/Hg) | 140.93 (21.47) | 137.79 (20.45) | 145.66 (22.17)** |
| Diastolic blood pressure (mm/Hg) | 83.76 (12.88) | 82.13 (12.03) | 86.23 (13.75)* |
| APEFR | 338.54 (152.54) | 380.19 (161.83) | 275.65** (111.51) |
| Former or current smoker (%) | 73.9 | 62.6 | 91.2** |
| Use of blood pressure medication (%) | 47.5 | 33.6 | 71.6* |
| Difficulties with IADLs | 0.20 (0.617) | 0.22 (0.667) | 0.18 (0.534) |
| Center for Epidemiological Studies Depression Scale | 8.76 (3.70) | 9.80** (4.06) | 7.16 (2.29) |
| Short portable mental status questionnaire | 8.84 (1.24) | 8.54 (1.26) | 9.31** (1.06) |
| Digit Symbol Substitution Test | 39.31 (21.75) | 46.20 (23.40) | 29.24** (14.01) |
| Backward digit span | 4.67 (2.15) | 4.74 (2.27) | 4.56 (1.98) |
| Alpha span | 4.90 (2.32) | 4.49 (2.31) | 5.50* (2.21) |
Note. CAATSA = Carolina African American Twin Study of Aging; PCA = patterns of cognitive aging; APEFR = average peak expiratory flow rate; IADLs = instrumental activities of daily living.
*
Significantly different from CAATSA at p < .01.
**
Significantly different from CAATSA at p < .001.