Table 1 Descriptive characteristics for adults 60–84 years of age who had their blood samples analyzed for PCBs, lead and cadmium and did not have a stroke (NHANES 1999–2002)
Variable | Males and females aged 60–84, who had completed data | Males and females aged 60–84, who did not have complete data | χ 2 (pvalue) |
|---|---|---|---|
N (%a) | N (%a) | ||
Age (years) | 0.12 (0.73) | ||
60-69 | 250 (50.24) | 162 (54.00) | |
70-84 | 248 (49.76) | 153 (46.00) | |
Race | 8.77 (0.03) | ||
MAb | 106 (2.98) | 76 (.53) | |
OHc | 35 (8.24) | 18 (6.78) | |
NHWd | 293 (82.02) | 160 (78.97) | |
NHBe | 64 (6.75) | 61 (10.71) | |
PIR (range) | 2.23 (0.14) | ||
1st tertile | 166 (28.63) | 79 (19.93) | |
2nd tertile | 167 (32.02) | 70 (22.42) | |
3rd tertile | 165 (39.35) | 57 (22.58) | |
Missing | NA | 109 (35.07) | |
Sex | 0.12 (0.73) | ||
Male | 231 (43.45) | 150 (43.00) | |
Female | 267 (56.55) | 165 (57.01) | |
Smoking Status | 0.08 (0.77) | ||
Smoker (cotinine > 10 ng/L) | 413 (81.01) | 253 (80.28) | |
Non-smoker (cotinine ≤ 10 ng/L) | 85 (18.99) | 55 (17.87) | |
Missing | NA | 7 (1.85) | |
Education | 6.81 (0.15) | ||
Less than 9th Grade | 120 (13.09) | 91 (12.90) | |
9-11th Grade | 80 (16.01) | 58 (18.70) | |
High School Grad/GED | 121 (30.25) | 63 (25.83) | |
Some College or AA degree | 96 (21.39) | 65 (25.41) | |
College Graduate or above | 81 (19.26) | 37 (16.93) | |
Missing | NA | 1 (0.22) | |
DSC Scores | 7.27 (0.06) | ||
1st Quartile | 131 (15.88) | 56 (10.22) | |
2nd Quartile | 128 (26.20) | 43 (14.88) | |
3rd Quartile | 129 (27.87) | 51 (19.12) | |
4th Quartile | 110 (30.06) | 67 (30.69) | |
Missing | NA | 98 (25.08) |