Table 3:
Neurobehavioral Means, Standard Error and 95% Confidence Intervals
| Controls (N=78) | Exposed (N=133) | |||
|---|---|---|---|---|
| Variable | Mean (S.E.) | 95%CI | Mean (S.E.) | 95%CI |
| Screening Tests | ||||
| Symbol Digit (latency) | 22.03 (0.37) | 21.30–22.76 | 22.97 (0.41) | 22.17–23.77 |
| Simple Reaction Time* (latency) | 333.79 (8.64) | 316.58–351 | 357.07 (6.77) | 343.68–370.45 |
| 5-Choice Reaction Time** (latency) | 353.76 (6.68) | 340.46–367.07 | 386.83 (6.62) | 373.73–399.92 |
| Attention | ||||
| Intra-Extra Dimensional Shift | ||||
| Total Errors Adjusted | 24.46 (2.06) | 20.36–28.57 | 30.46 (2.99) | 24.54–36.38 |
| Total Trial Adjusted | 93.58 (3.47) | 86.67–100.49 | 103.5 (5.13) | 93.36–113.65 |
| Stages Completed | 8.62 (0.09) | 8.44–8.79 | 8.36 (0.12) | 8.12–8.60 |
| Match to Sample | ||||
| Total Correct** | 46.78 (0.16) | 46.46–47.10 | 46.18 (0.16) | 45.87–46.49 |
| Latency | 2147.9 (82.49) | 1983.6–2312.1 | 2288.5 (81.14) | 2128–2449 |
| Rapid Visual Processing | ||||
| Sensitivity to Target | 0.90 (0.01) | 0.88–0.91 | 0.88 (0.01) | 0.87–0.89 |
| Probability of Hit | 0.62 (0.02) | 0.57–0.66 | 0.57 (0.02) | 0.54–0.61 |
| Probability of False Alarm | 0.01 (0.00) | 0.01–0.02 | 0.19 (0.00) | 0.01–0.03 |
| Working Memory | ||||
| Spatial Working Memory | ||||
| Between Errors | 29.51 (2.22) | 25.09–33.93 | 31.96 (1.91) | 28.19–35.73 |
| Within Errors | 2.65 (0.51) | 1.64–3.67 | 3.02 (0.43) | 2.16–3.87 |
| Double Errors | 1.47 (0.32) | 0.83–2.11 | 1.80 (0.30) | 1.21–2.40 |
| Strategy | 32.87 (0.62) | 31.63–34.12 | 33.68 (0.50) | 32.70–34.66 |
| Spatial Span | ||||
| Span Length | 5.74 (0.15) | 5.44–6.04 | 5.77 (0.11) | 5.56–5.99 |
| Errors | 12.95 (0.67) | 11.61–14.29 | 13.54 (0.58) | 12.39–14.69 |
| Stockings of Cambridge | ||||
| Problems Solved in Minimum Moves* | 7.99 (0.20) | 7.59–8.39 | 7.41 (0.17) | 7.08–7.74 |
| Visual Memory | ||||
| Delayed Match to Sample | ||||
| Total Correct All Delays | 24.81 (0.38) | 24.04–25.57 | 24.43 (0.28) | 23.87–24.99 |
| Mean Correct Latency All Delays | 3397 (100.79) | 3196.3–3597.7 | 3637.7 (85.17) | 3469.3–3806.2 |
| Paired Associate Learning | ||||
| Total Errors Adjusted | 14.33 (1.72) | 10.90–17.77 | 17.64 (1.56) | 14.56–20.72 |
| Mean Errors to Success | 1.71 (0.17) | 1.38–2.04 | 2.13 (0.16) | 1.81–2.45 |
| First Trial Memory Score | 19.06 (0.43) | 18.22–19.91 | 18.59 (0.31) | 17.98–19.20 |
| Stages Completed | 7.96 (0.03) | 7.90–8.02 | 7.94 (0.03) | 7.89–7.99 |
| Visual Memory Cont–d | ||||
| Pattern Recognition Memory | ||||
| Number Correct | 19.67 (0.34) | 18.99–20.35 | 19.17 (0.26) | 18.65–19.68 |
| Latency | 2248.9 (64.91) | 2119.6–2378.1 | 2271.8 (53.49) | 2166–2377.7 |
| Spatial Recognition Memory | ||||
| Number Correct | 15.95 (0.24) | 15.47–16.42 | 15.46 (0.22) | 15.03–15.89 |
| Latency | 2312.7 (73.07) | 2167.2–2458.2 | 2715.1 (103.4) | 2510.5–2919.6 |
| Motor Skill | ||||
| Finger Tapping*-alternating (#taps) | 196.1 (5.93) | 184.28–207.91 | 173.34 (4.25) | 164.92–181.75 |
| Verbal Memory | ||||
| Associate Learning | ||||
| Delayed Recall**(#correct) | 2.58 (0.28) | 2.02–3.14 | 1.63 (0.17) | 1.30–1.97 |
•
Note:
*
p<0.10;
**
p <0.05