Table 4.
Backward elimination regression analysis of predictors of normalized fine motor task performance among subjects with patella bone lead measurements.
| Variable | Grooved pegboard | Neuroskill | ||
|---|---|---|---|---|
| Signature score | lm pattern score | |||
| N | Estimate (95% CI) p-value | Estimate (95% CI) p-value | Estimate (95% CI) p-value | |
| Patella | 281 | 0.006 (−0.007, 0.012) p = 0.08 |
Eliminated | 0.006 (0.0002, 0.011) p = 0.423 |
| Age | 281 | 0.035 (0.019, 0.051) p <0.0001 |
Eliminated | Eliminated |
| Education | Eliminated | |||
| HS or less | 88 | Reference group | Reference group | |
| Some or completed college | 135 | 0.1426 (−0.119, 0.404) p = 0.2858 |
0.349 (0.115, 0.583) p = 0.004 |
|
| Graduate school | 55 | 0.557 (0.234, 0.881) p = 0.0007 |
0.185 (−0.102, 0.472) p = 0.207 |
|
| Missing | 3 | 1.55 (0.15, 2.95) p = 0.03 |
0.018 (−0.908, 0.944) p = 0.969 |
|
| Computer experience | Eliminated | Eliminated | ||
| No | 111 | Reference group | ||
| Yes | 167 | −0.32 (−0.56, −0.081) p = 0.009 |
||
| Missing | 3 | 0.113 (−1.284, 1.509) p = 0.8744 |
||
| Financial stability | Eliminated | Eliminated | ||
| “Can’t make ends meet” or “Just manage to get by” | 52 | Reference group | ||
| “Have enough to get along, and extra” | 122 | −0.423 (−0.705, − 0.141) p =0.0033 |
||
| “Can buy anything I want” | 94 | −0.3 (−0.604, 0.005) p = 0.0535 |
||
| Missing | 13 | −0.225 (−0.923, 0.4734) p = 0.5279 |
||
| Income | Eliminated | |||
| Less than $34,999 | 69 | Reference group | Reference group | |
| $35K– $49,999 | 63 | 0.081 (−0.214, 0.377) p = 0.5891 |
0.044 (−0.237, 0.325) p = 0.759 |
|
| $50K– $74,999 | 66 | 0.296 (−0.0034, 0.595) p = 0.0526 |
0.312 (0.026, 0.597) p = 0.032 |
|
| More than $75K | 57 | 0.552 (0.242, 0.863) p = 0.0005 |
0.398 (0.102, 0.693) p = 0.009 |
|
| Missing | 26 | −0.073 (−0.584, 0.438) p= 0.7784 |
0.061 (−0.303, 0.426) p = 0.741 |
|
| Alcohol (drinks per week) | Eliminated | Eliminated | ||
| 0 | 72 | Reference group | ||
| More than zero, <= 10 | 102 | 0.174 (−0.088, 0.435) p = 0.1924 |
||
| More than 10, <= 20 | 54 | 0.294 (−0.01, 0.597) p = 0.058 |
||
| More than 20 | 53 | 0.453 (0.146, 0.761) p = 0.004 |
||