Table 4 Neurocognitive outcomes summary statistics
From: Neurocognitive impact of metal exposure and social stressors among schoolchildren in Taranto, Italy
|  | Total | 0–1 km | 1–5 km | 5–10 km | 10–15 km | P-value†|
|---|---|---|---|---|---|---|
WISC-IV | ||||||
 IQ | 106.0 (94.0, 115.0) | 94.0 (87.0, 107.0) | 98.0 (90.5, 110.0) | 108.0 (97.5, 118.0) | 110.0 (99.5, 118.0) | <  0.001 |
 GAI | 108.0 (96.0, 116.0) | 99.0 (88.0, 110.5) | 102.0 (91.5, 114.0) | 109.5 (101.0, 119.0) | 112.0 (101.5, 122.5) | <  0.001 |
 CPI | 100.0 (91.0, 109.0) | 94.0 (85.0, 102.5) | 98.0 (87.0, 104.0) | 104.0 (92.0, 111.0) | 104.0 (94.0, 111.5) | <  0.001 |
 WMI | 100.0 (88.0, 109.0) | 88.0 (82.0, 100.0) | 94.0 (88.0, 100.0) | 100.0 (94.0, 109.0) | 106.0 (91.0, 109.0) | <  0.001 |
 PSI | 103.0 (94.0, 112.0) | 103.0 (91.7, 111.2) | 100.0 (91.0, 109.0) | 103.0 (94.0, 112.0) | 103.0 (93.2, 109.0) | 0.379 |
 PRI | 106.0 (95.0, 117.0) | 98.0 (90.5, 111.0) | 99.0 (89.0, 111.0) | 108.0 (100.0, 117.0) | 109.5 (98.5, 119.0) | <  0.001 |
 VCI | 108.0 (98.0, 118.0) | 98.0 (88.0, 108.5) | 104.0 (92.0, 112.5) | 110.0 (102.0, 118.0) | 112.0 (105.5, 122.0) | <  0.001 |
CANTAB | ||||||
 RVP | ||||||
  Probability of hit | 0.8 (0.7, 0.9) | 0.750 (0.667, 0.896) | 0.8 (0.6, 0.9) | 0.8 (0.7, 0.9) | 0.8 (0.7, 0.9) | 0.170 |
  Total false alarms | 2.0 (1.0, 3.5) | 2.0 (0.5, 3.0) | 2.0 (1.0, 4.0) | 2.0 (1.0, 3.0) | 1.0 (1.0, 3.5) | 0.055 |
 SWM | ||||||
  Between errors | 54.0 (41.5, 63.0) | 60.0 (43.0, 68.0) | 56.0 (41.0, 64.0) | 51.0 (39.0, 60.0) | 54.0 (42.5, 61.5) | 0.025 |
  Strategy | 38.0 (36.0, 40.0) | 39.0 (37.0, 42.0) | 38.0 (36.0, 40.0) | 37.5 (35.0, 39.0) | 38.0 (36.0, 40.5) | 0.026 |
 SST | ||||||
  Direction errors on stop and go trials | 3.0 (1.0, 7.0) | 2.0 (0.5, 3.0) | 3.0 (1.0, 6.5) | 3.0 (1.0, 7.0) | 3.0 (1.0, 8.5) | 0.091 |
  Proportion of successful stops | 0.5 (0.4, 0.6) | 0.5 (0.5, 0.6) | 0.5 (0.4, 0.6) | 0.5 (0.4, 0.6) | 0.5 (0.4, 0.6) | 0.662 |
  Mean correct reaction time on go trials | 722.0 (625.8, 878.4) | 725.7 (655.6, 938.8) | 703.8 (609.3, 884.9) | 742.8 (633.6, 889.9) | 691.5 (616.0, 803.7) | 0.187 |
  Stop signal delay | 384.8 (286.5, 496.5) | 404.4 (337.7, 478.8) | 384.8 (271.7, 502.9) | 398.1 (265.8, 526.7) | 356.7 (283.4, 440.2) | 0.219 |
  Stop signal reaction time | 282.1 (234.0, 344.8) | 274.2 (236.8, 355.5) | 285.8 (233.4, 341.8) | 294.1 (240.6, 345.2) | 271.5 (224.1, 334.4) | 0.578 |
  Total correct on stop and go trials | 282.0 (275.0, 288.0) | 283.0 (280.0, 289.0) | 281.0 (275.0, 289.5) | 282.0 (275.0, 289.0) | 280.0 (273.0, 286.0) | 0.188 |
 SOC | ||||||
  Problems solved in minimum moves | 6.0 (5.0, 7.0) | 7.0 (5.0, 8.0) | 6.0 (5.0, 6.5) | 6.0 (5.0, 7.0) | 6.0 (5.0, 7.0) | 0.071 |