From: Age within schoolyear and attention-deficit hyperactivity disorder in Scotland and Wales
Scotland | Wales | Overall | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ADHD | No ADHD | p value | ADHD | No ADHD | p value | ADHD | No ADHD | |||||||
N = 5,803 | N = 693,522 | N = 2,918 | N = 300,633 | N = 8,721 | N = 994,155 | |||||||||
n | % | n | % | n | % | n | % | n | % | n | % | |||
Gender | < 0.001a | < 0.001a | ||||||||||||
Male | 4,921 | 84.80 | 342,819 | 49.43 | 2,469 | 84.61 | 153,229 | 50.97 | 7,390 | 84.74 | 496,048 | 49.90 | ||
Female | 882 | 15.20 | 350,703 | 50.57 | 449 | 15.39 | 147,404 | 49.03 | 1,331 | 15.26 | 498,107 | 50.10 | ||
Welsh/Scottish Index of Multiple Deprivation | < 0.001b | < 0.001b | ||||||||||||
1 (Most deprived) | 1,863 | 32.18 | 157,444 | 22.73 | 987 | 33.82 | 73,646 | 24.50 | 2,850 | 32.73 | 231,090 | 23.27 | ||
2 | 1,457 | 25.17 | 139,997 | 20.22 | 667 | 22.86 | 62,204 | 20.69 | 2,124 | 24.39 | 202,201 | 20.36 | ||
3 | 1,015 | 17.53 | 133,947 | 19.34 | 537 | 18.40 | 59,051 | 19.64 | 1,552 | 17.82 | 192,998 | 19.43 | ||
4 | 856 | 14.79 | 134,187 | 19.38 | 398 | 13.64 | 48,846 | 16.25 | 1,254 | 14.40 | 183,033 | 18.43 | ||
5 (Least deprived) | 598 | 10.33 | 126,962 | 18.33 | 329 | 11.27 | 56,886 | 18.92 | 927 | 10.65 | 183,848 | 18.51 | ||
Missing | 14 | 985 | 0 | 0 | 14 | 985 | ||||||||
Maternal age (years) | < 0.001b | < 0.001b | ||||||||||||
19 | 1,005 | 17.32 | 56,408 | 8.13 | 478 | 16.38 | 27,893 | 9.28 | 1,483 | 17.00 | 84,301 | 8.48 | ||
20–24 | 1,680 | 28.95 | 133,302 | 19.22 | 910 | 31.19 | 67,145 | 22.34 | 2,590 | 29.70 | 200,447 | 20.16 | ||
25–29 | 1,562 | 26.92 | 204,476 | 29.48 | 777 | 26.63 | 87,434 | 29.09 | 2,339 | 26.82 | 291,910 | 29.37 | ||
30–34 | 1,071 | 18.46 | 196,610 | 28.35 | 498 | 17.07 | 76,870 | 25.58 | 1,569 | 17.99 | 273,480 | 27.51 | ||
335 | 485 | 8.36 | 102,714 | 14.81 | 255 | 8.74 | 41,202 | 13.71 | 740 | 8.49 | 143,916 | 14.48 | ||
Missing | 0 | 12 | 0 | 89 | 0 | 101 | ||||||||
Maternal smoking | < 0.001a | < 0.001a | ||||||||||||
No | 2,673 | 51.86 | 446,432 | 72.65 | 452 | 58.25 | 65,806 | 79.13 | 3,125 | 52.70 | 512,238 | 73.42 | ||
Yes | 2,481 | 48.14 | 168,055 | 27.35 | 324 | 41.75 | 17,352 | 20.87 | 2,805 | 47.30 | 185,407 | 26.58 | ||
Missing | 649 | 79,035 | 2,142 | 217,475 | 2,791 | 296,510 | ||||||||
Gestational age (weeks) | < 0.001b | < 0.001b | ||||||||||||
< 28 | 21 | 0.36 | 721 | 0.10 | 17 | 0.58 | 643 | 0.21 | 38 | 0.44 | 1,364 | 0.14 | ||
28–34 | 181 | 3.12 | 13,478 | 1.94 | 99 | 3.39 | 6,823 | 2.27 | 280 | 3.21 | 20,301 | 2.04 | ||
35–36 | 315 | 5.43 | 23,315 | 3.36 | 137 | 4.69 | 10,693 | 3.56 | 452 | 5.18 | 34,008 | 3.42 | ||
37–41 | 5,088 | 87.72 | 630,151 | 90.93 | 2,488 | 85.26 | 264,048 | 87.83 | 7,576 | 86.90 | 894,199 | 89.99 | ||
342 | 195 | 3.36 | 25,369 | 3.66 | 177 | 6.07 | 18,426 | 6.13 | 372 | 4.27 | 43,795 | 4.41 | ||
Missing | 3 | 488 | 0 | 0 | 3 | 488 | ||||||||
Birth weight (g) | < 0.001b | < 0.001b | ||||||||||||
£1,000 | 25 | 0.43 | 938 | 0.14 | 11 | 0.38 | 568 | 0.19 | 36 | 0.41 | 1,506 | 0.15 | ||
1,001–1,500 | 3 | 0.05 | 192 | 0.03 | 20 | 0.69 | 1,498 | 0.50 | 23 | 0.26 | 1,690 | 0.17 | ||
1,501–2,500 | 466 | 8.03 | 35,769 | 5.16 | 227 | 7.81 | 14,722 | 4.91 | 693 | 7.96 | 50,491 | 5.08 | ||
2,501–4,000 | 4,693 | 80.87 | 569,582 | 82.15 | 2,345 | 80.72 | 248,585 | 82.89 | 7,038 | 80.82 | 818,167 | 82.37 | ||
4,001–4,500 | 519 | 8.94 | 73,333 | 10.58 | 253 | 8.71 | 29,356 | 9.79 | 772 | 8.87 | 102,689 | 10.34 | ||
> 4,500 | 97 | 1.67 | 13,496 | 1.95 | 49 | 1.69 | 5,186 | 1.73 | 146 | 1.68 | 18,682 | 1.88 | ||
Missing | 0 | 212 | 13 | 718 | 13 | 930 | ||||||||
5 min Apgar score | < 0.001b | < 0.001b | ||||||||||||
0–3 | 42 | 0.74 | 3,116 | 0.45 | 128 | 7.06 | 9,641 | 4.41 | 170 | 2.26 | 12,757 | 1.41 | ||
4–6 | 77 | 1.35 | 6,305 | 0.92 | 24 | 1.32 | 1,882 | 0.86 | 101 | 1.34 | 8,187 | 0.90 | ||
7–10 | 5,595 | 97.92 | 677,504 | 98.63 | 1,662 | 91.62 | 206,996 | 94.73 | 7,257 | 96.40 | 884,500 | 97.69 | ||
Missing | 89 | 6,597 | 1,104 | 82,114 | 1,193 | 88,711 | ||||||||
Parity | 0.893a | < 0.001a | ||||||||||||
0 | 2,630 | 45.73 | 315,009 | 45.64 | 1,134 | 42.74 | 114,650 | 43.87 | 3,764 | 44.79 | 429,659 | 45.16 | ||
31 | 3,121 | 54.27 | 375,160 | 54.36 | 1,519 | 57.26 | 146,687 | 56.13 | 4,640 | 55.21 | 521,847 | 54.84 | ||
Missing | 52 | 3,353 | 265 | 39,296 | 317 | 42,649 | ||||||||
Mode of delivery | 0.207a | 0.025a | ||||||||||||
Caesarean section | 1,132 | 19.51 | 139,915 | 20.17 | 512 | 17.55 | 57,686 | 19.19 | 5,183 | 59.43 | 611,291 | 61.49 | ||
Other | 4,671 | 80.49 | 553,605 | 79.83 | 2,406 | 82.45 | 242,947 | 80.81 | 3,538 | 40.57 | 382,862 | 38.51 | ||
Missing | 0 | 2 | 0 | 0 | 0 | 2 |