Table 3.
Sorted ADHD symptom frequencies in probands, divided by centre
|
Probands (N = 1068) |
Controls (N = 79)° |
Logistic regression § |
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| SWI_Z | BEL_G | IRL_D | NLD_G | ISR_P | GER_E | NLD_A | ESP_V | ISR_J | ENG_L/S | GER_G | All centres | χp2 | p | All centres | Tw # | p | ||
| Inattention | ||||||||||||||||||
| IA8 | Distracted | 100.0 | 100.0 | 100.0 | 100.0 | 99.2 | 100.0 | 100.0 | 100.0 | 100.0 | 99.4 | 100.0 | 99.8 | 4.8 | n.s. | 87.3 | 0.000 | .988 |
| IA1 | Attention to details | 100.0 | 100.0 | 98.0 | 98.8 | 100.0 | 100.0 | 99.4 | 100.0 | 100.0 | 99.4 | 100.0 | 99.4 | 8.0 | n.s. | 69.6 | 3.809 | .051 |
| IA5 | Organising tasks | 92.3 | 100.0 | 93.0 | 97.0 | 97.7 | 100.0 | 97.4 | 100.0 | 98.3 | 96.6 | 98.8 | 97.1 | 17.0 | n.s. | 58.2 | 5.336 | .021 |
| IA6 | Reluctance to begin | 94.2 | 84.4 | 93.0 | 86.1 | 94.7 | 94.4 | 96.1 | 95.9 | 93.3 | 95.5 | 100.0 | 93.6 | 29.4 | ** | 60.8 | 0.219 | .640 |
| IA3 | Listening | 94.2 | 96.9 | 89.0 | 81.2 | 99.2 | 97.2 | 96.1 | 98.6 | 100.0 | 86.0 | 98.8 | 92.4 | 74.3 | *** | 49.4 | 6.718 | .010 |
| IA4 | Following instructions | 75.0 | 71.9 | 89.0 | 80.0 | 92.5 | 80.6 | 92.9 | 87.8 | 96.7 | 91.6 | 90.2 | 88.0 | 36.7 | *** | 51.9 | 0.151 | .698 |
| IA2 | Sustaining attention | 78.8 | 90.6 | 89.0 | 91.5 | 79.7 | 83.3 | 90.3 | 78.4 | 88.3 | 86.6 | 100.0 | 87.5 | 41.5 | *** | 44.3 | 0.746 | .388 |
| IA7 | Losing things | 71.2 | 71.9 | 82.0 | 77.6 | 78.2 | 88.9 | 85.8 | 90.5 | 81.7 | 88.8 | 89.0 | 83.1 | 24.5 | ** | 45.6 | 0.603 | .437 |
| IA9 | Forgetful | 80.8 | 84.4 | 80.0 | 79.4 | 77.4 | 86.1 | 84.5 | 82.4 | 80.0 | 83.8 | 86.6 | 81.9 | 6.2 | n.s. | 46.8 | 0.172 | .678 |
| Mean (inattention) | 87.4 | 88.9 | 90.3 | 87.9 | 91.0 | 92.3 | 93.6 | 92.6 | 93.1 | 92.0 | 95.9 | 91.4 | 26.9 | 57.1 | 1.973 | |||
| Hyperactivity Impuslivity | ||||||||||||||||||
| IMP9 | Interrupting/intruding | 96.2 | 100.0 | 100.0 | 100.0 | 98.5 | 100.0 | 100.0 | 100.0 | 98.3 | 99.4 | 98.8 | 99.3 | 13.3 | n.s. | 77.2 | 1.766 | .184 |
| HYP1 | Fidgeting | 98.1 | 88.5 | 96.0 | 98.8 | 96.2 | 100.0 | 99.4 | 98.6 | 98.3 | 98.9 | 100.0 | 98.4 | 12.0 | n.s. | 44.3 | 7.215 | .007 |
| HYP3 | Running about/climbing | 84.6 | 87.5 | 93.0 | 93.3 | 97.7 | 91.7 | 96.1 | 93.2 | 98.3 | 96.6 | 100.0 | 94.9 | 26.7 | ** | 34.2 | 10.569 | .001 |
| HYP5 | Being 'on the go' | 80.8 | 78.1 | 85.0 | 97.0 | 91.7 | 94.4 | 95.5 | 91.9 | 95.0 | 96.6 | 98.8 | 93.2 | 41.2 | *** | 32.9 | 7.956 | .005 |
| IMP8 | Difficulties waiting turn | 92.3 | 96.9 | 92.0 | 97.0 | 88.7 | 94.4 | 92.9 | 87.8 | 90.0 | 88.3 | 98.8 | 92.2 | 23.9 | ** | 40.5 | 3.856 | .050 |
| HYP6 | Talking | 82.7 | 93.8 | 95.0 | 95.2 | 86.5 | 91.7 | 88.4 | 97.3 | 86.7 | 93.3 | 97.6 | 91.9 | 26.8 | ** | 58.2 | 1.641 | .200 |
| HYP2 | Leaving seat | 80.8 | 78.1 | 90.0 | 89.1 | 84.2 | 83.3 | 89.7 | 86.5 | 98.3 | 90.5 | 98.8 | 89.0 | 31.4 | ** | 36.7 | 2.798 | .094 |
| IMP7 | Blurting out | 75.0 | 87.5 | 85.0 | 82.4 | 90.2 | 83.3 | 78.7 | 87.8 | 76.7 | 82.1 | 86.6 | 83.2 | 14.5 | n.s. | 45.6 | 0.920 | .338 |
| HYP4 | Quiet activities | 59.6 | 68.8 | 73.0 | 80.0 | 73.7 | 80.6 | 69.7 | 79.7 | 81.7 | 89.4 | 93.9 | 78.5 | 50.6 | *** | 27.8 | 1.129 | .288 |
| Mean (hyperactivity/impulsivity) | 83.3 | 86.6 | 89.9 | 92.5 | 89.7 | 91.0 | 90.0 | 91.4 | 91.5 | 92.8 | 97.0 | 91.2 | 91.4 | 44.16 | 4.205 | |||
| Overall Mean | 85.4 | 87.7 | 90.1 | 90.2 | 90.4 | 91.7 | 91.8 | 92.0 | 92.3 | 92.4 | 96.5 | 91.3 | 36.9 | 50.63 | 3.09 | |||
Notes: For abbreviations of sites see methods section; sites in ascending order (overall mean); symptoms in descending order (All sites) within subtypes
χp2 Partial chi-square of hierarchical logliniear analysis
*** p < .001 ** p < .01 * p < .05 n.s. p ≥ .05
° Diagnosed siblings without ADHD diangosis (ADHD-NT)
§ R2 = .272 (Cox & Snell), .689 (Nagelkerke). Model X2 (18) = 363.6, p < .001.
# Tw = Wald statistics (b/S.E.b)2