Table 2.
Age-adjusted mean bone lead levels by characteristics of the study participants.
| N (%) | Mean (SE) | |||
|---|---|---|---|---|
| Tibia lead, µg/g | Patella lead, µg/g | PTA, dB HL | ||
| Age (yrs)* | ||||
| <60 | 127 (28.4) | 17.1 (1.2)§ | 24.9 (1.8)§ | 14.8 (0.84)§ |
| 60–69 | 207 (46.2) | 23.6 (0.96) | 34.1 (1.4) | 21.0 (0.66) |
| 70+ | 114 (25.5) | 26.6 (1.3) | 38.1 (1.9) | 25.8 (0.89) |
| Race | ||||
| White | 434 (96.9) | 22.3 (0.65)† | 32.2 (0.95) | 20.6 (0.45) |
| Non-white | 14 (3.1) | 30.1 (3.6) | 41.2 (5.3) | 16.8 (2.5) |
| Education (yrs) | ||||
| ≤12 | 214 (47.8) | 26.3 (0.90)§ | 37.7 (1.3)§ | 21.5 (0.64)† |
| >12 | 234 (52.8) | 19.0 (0.86) | 27.8 (1.3) | 19.5 (0.61) |
| Smoking (pack-yrs) | ||||
| 0 | 150 (33.5) | 19.7 (1.1)§ | 28.8 (1.6)§ | 20.2 (0.76) |
| <30 | 173 (38.6) | 22.4 (1.0) | 31.7 (1.5) | 19.5 (0.71) |
| 30+ | 125 (27.9) | 26.1 (1.2) | 38.1 (1.8) | 22.1 (0.83) |
| Occupational noise | ||||
| Low | 144 (32.1) | 18.2 (1.1)§ | 26.3 (1.6)§ | 18.8 (0.78)† |
| Medium | 175 (39.1) | 24.4 (1.0) | 34.6 (1.5) | 21.2 (0.71) |
| High | 129 (28.8) | 24.8 (1.2) | 36.7 (1.7) | 21.4 (0.82) |
| Noise notch | ||||
| No | 406 (90.6) | 22.0 (0.68)† | 31.8 (0.98)† | 20.2 (0.46) |
| Yes | 42 (9.4) | 27.5 (2.1) | 39.7 (3.1) | 22.7 (1.4) |
| BMI | ||||
| <25 | 104 (23.2) | 19.4 (1.3) | 28.0 (1.9) | 19.2 (0.92) |
| 25–29.9 | 254 (56.7) | 23.8 (0.85) | 34.3 (1.2) | 20.8 (0.59) |
| 30+ | 90 (20.1) | 22.3 (1.4) | 32.6 (2.1) | 21.2 (0.99) |
| Hypertension | ||||
| No | 273 (60.9) | 22.1 (0.83) | 31.1 (1.2) | 19.9 (0.57) |
| Yes | 175 (39.6) | 23.2 (1.0) | 34.7 (1.5) | 21.3 (0.71) |
| Diabetes | ||||
| No | 390 (87.1) | 22.2 (0.69) | 32.1 (1.0) | 20.3 (0.47) |
| Yes | 58 (12.9) | 24.8 (1.8) | 35.3 (2.6) | 21.4 (1.2) |
*
For the age category, unadjusted mean bone lead levels and pure-tone average (PTA) (SE) were presented.
†
p<0.05,
‡
p<0.01,
§
p<0.001.