Table 1 Baseline characteristics of the Normative Aging Study (NAS) cohort (N = 582)
From: Mitochondrial haplogroups modify the effect of black carbon on age-related cognitive impairment
Characteristics | N | (%) | BC concentration (μg/m3) Mean ± StdDev |
|---|---|---|---|
Age (Years) | |||
50-59 | 38 | (6.5) | 0.54 ± 0.30 |
60-69 | 243 | (41.8) | 0.60 ± 0.28 |
70-79 | 242 | (41.6) | 0.59 ± 0.27 |
80-89 | 57 | (9.8) | 0.61 ± 0.35 |
90-99 | 2 | (0.3) | 0.47 ± 0.40 |
Education (Years) | |||
<12 | 175 | (30.1) | 0.63 ± 0.30 |
12|–|16 | 290 | (49.8) | 0.59 ± 0.28 |
>16 | 117 | (20.1) | 0.53 ± 0.24 |
First Language | |||
English | 498 | (85.6) | 0.59 ± 0.28 |
Not English/Bilingual | 84 | (14.4) | 0.60 ± 0.27 |
Computer Experience | |||
Yes | 242 | (41.6) | 0.56 ± 0.26 |
No | 340 | (58.4) | 0.61 ± 0.29 |
Physical Activity (MET-hr/week) | |||
<12 | 324 | (55.7) | 0.59 ± 0.29 |
12|–30 | 160 | (27.5) | 0.61 ± 0.29 |
≥30 | 98 | (16.8) | 0.57 ± 0.25 |
Alcohol (drinks/day) | |||
<2 | 439 | (75.4) | 0.59 ± 0.29 |
≥2 | 143 | (24.6) | 0.58 ± 0.25 |
Diabetes | |||
No | 499 | (85.7) | 0.59 ± 0.29 |
Yes | 83 | (14.3) | 0.60 ± 0.25 |
Consumed Dark Fish (times/week) | |||
<1 | 497 | (85.4) | 0.59 ± 0.28 |
≥1 | 85 | (14.6) | 0.57 ± 0.28 |
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Nonwhite (% of census tract) | |||
<5% | 226 | (38.8) | 0.54 ± 0.30 |
5% |—10% | 157 | (27) | 0.55 ± 0.25 |
≥10% | 199 | (34.2) | 0.68 ± 0.26 |
≥25 years of age with at least a college degree (% of census tract) | |||
<30% | 192 | (33) | 0.64 ± 0.30 |
30% |—50% | 230 | (39.5) | 0.56 ± 0.28 |
≥50% | 160 | (27.5) | 0.58 ± 0.25 |
Smoking Status | |||
Never | 172 | (29.6) | 0.57 ± 0.25 |
Former | 34 | (5.8) | 0.63 ± 0.21 |
Current | 376 | (64.6) | 0.60 ± 0.30 |
BMI (Kg/m 2 ) | |||
<25 | 136 | (23.4) | 0.61 ± 0.27 |
≥25 | 446 | (76.6) | 0.58 ± 0.28 |
Hypertension | |||
No | 190 | (32.6) | 0.56 ± 0.26 |
Yes | 392 | (67.4) | 0.61 ± 0.29 |
Ethnicity | |||
English Speaking European countries | 263 | (45.2) | 0.61 ± 0.30 |
Mediterranean European countries | 141 | (24.2) | 0.60 ± 0.27 |
Others European countries | 113 | (19.4) | 0.55 ± 0.26 |
Others | 65 | (11.2) | 0.56 ± 0.27 |