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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
  1. Notes: Neurocognitive outcomes from the WISC-IV and CANTAB by distance from the source - Median (Q1, Q3)
  2. WISC-IV Wechsler Intelligence Scale for Children edition IV, IQ Intellectual Quotient, VCI Verbal Comprehension Index, PRI Visual-Perceptual Reasoning Index, WMI Working Memory Index, PSI Processing Speed Index, GAI General Ability Index, CPI Cognitive Proficiency Index, CANTAB Cambridge Neuropsychological Test Automated Battery, RVP Rapid Visual Information Processing, SST Stop Signal Task, SWM Spatial Working Memory, SOC Stockings of Cambridge
  3. †Kruskal-Wallis rank sum test