Table 1.
Descriptives of study population by asthma status in school Grades 7–8.
| No asthma | Mild/mod controlled | Severe controlled | Mild/mod uncontrolled | Severe uncontrolled | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| N | % | N | % | N | % | N | % | N | % | |
| Study population | 539,422 | 94.5 | 27,442 | 4.8 | 897 | 0.2 | 2,627 | 0.5 | 207 | 0.0 |
| Child’s gender | ||||||||||
| Boy | 272,166 | 94.0 | 15,405 | 5.3 | 553 | 0.2 | 1,373 | 0.5 | 116 | 0.0 |
| Girl | 267,256 | 95.1 | 12,037 | 4.3 | 344 | 0.1 | 1,254 | 0.4 | 91 | 0.0 |
| Birth month | ||||||||||
| January | 45,426 | 94.0 | 2,571 | 5.3 | 83 | 0.2 | 242 | 0.5 | 28 | 0.1 |
| February | 44,596 | 94.1 | 2,485 | 5.2 | 65 | 0.1 | 207 | 0.4 | 22 | 0.0 |
| March | 51,140 | 94.3 | 2,710 | 5.0 | 81 | 0.1 | 256 | 0.5 | 17 | 0.0 |
| April | 51,209 | 94.5 | 2,626 | 4.8 | 98 | 0.2 | 222 | 0.4 | 17 | 0.0 |
| May | 48,984 | 94.8 | 2,313 | 4.5 | 90 | 0.2 | 246 | 0.5 | 16 | 0.0 |
| June | 47,709 | 95.0 | 2,194 | 4.4 | 74 | 0.1 | 214 | 0.4 | 11 | 0.0 |
| July | 47,548 | 95.1 | 2,154 | 4.3 | 68 | 0.1 | 219 | 0.4 | 15 | 0.0 |
| August | 45,855 | 94.7 | 2,251 | 4.6 | 70 | 0.1 | 225 | 0.5 | 21 | 0.0 |
| September | 42,930 | 94.6 | 2,166 | 4.8 | 80 | 0.2 | 205 | 0.5 | 13 | 0.0 |
| October | 40,653 | 94.5 | 2,047 | 4.8 | 75 | 0.2 | 209 | 0.5 | 14 | 0.0 |
| November | 36,411 | 94.2 | 1,974 | 5.1 | 64 | 0.2 | 206 | 0.5 | 15 | 0.0 |
| December | 36,961 | 94.4 | 1,951 | 5.0 | 49 | 0.1 | 176 | 0.4 | 18 | 0.0 |
| ADHD | ||||||||||
| No | 518,394 | 94.6 | 25,973 | 4.7 | 842 | 0.2 | 2,439 | 0.4 | 194 | 0.0 |
| Yes | 21,028 | 92.4 | 1,469 | 6.5 | 55 | 0.2 | 188 | 0.8 | 13 | 0.1 |
| Mother’s birth place | ||||||||||
| Sweden | 460,671 | 94.3 | 24,418 | 5.0 | 826 | 0.2 | 2,256 | 0.5 | 183 | 0.0 |
| Nordic country | 15,336 | 94.6 | 781 | 4.8 | 12 | 0.1 | 70 | 0.4 | 8 | 0.0 |
| EU | 9,325 | 95.8 | 360 | 3.7 | 13 | 0.1 | 32 | 0.3 | 1 | 0.0 |
| Europe, not EU | 17,255 | 97.1 | 440 | 2.5 | 6 | 0.0 | 60 | 0.3 | 3 | 0.0 |
| Africa | 6,958 | 94.5 | 348 | 4.7 | 9 | 0.1 | 47 | 0.6 | 4 | 0.1 |
| North America, Oceania | 1,544 | 94.1 | 84 | 5.1 | 2 | 0.1 | 9 | 0.5 | 1 | 0.1 |
| South America | 4,165 | 94.2 | 207 | 4.7 | 4 | 0.1 | 43 | 1.0 | 1 | 0.0 |
| Asia | 24,148 | 96.2 | 804 | 3.2 | 25 | 0.1 | 110 | 0.4 | 6 | 0.0 |
| Missing | 20 | 100.0 | 0 | 0.0 | 0 | 0.0 | 0 | 0.0 | 0 | 0.0 |
| Father’s birth place | ||||||||||
| Sweden | 454,320 | 94.4 | 24,016 | 5.0 | 812 | 0.2 | 2,193 | 0.5 | 185 | 0.0 |
| Nordic country | 14,130 | 94.6 | 701 | 4.7 | 21 | 0.1 | 77 | 0.5 | 8 | 0.1 |
| EU | 10,265 | 95.4 | 432 | 4.0 | 8 | 0.1 | 49 | 0.5 | 1 | 0.0 |
| Europe, not EU | 18,982 | 97.1 | 485 | 2.5 | 8 | 0.0 | 64 | 0.3 | 1 | 0.0 |
| Africa | 8,768 | 93.8 | 490 | 5.2 | 16 | 0.2 | 64 | 0.7 | 6 | 0.1 |
| North America, Oceania | 2,178 | 93.2 | 148 | 6.3 | 3 | 0.1 | 8 | 0.3 | 0 | 0.0 |
| South America | 4,358 | 94.1 | 224 | 4.8 | 4 | 0.1 | 43 | 0.9 | 0 | 0.0 |
| Asia | 23,727 | 96.2 | 805 | 3.3 | 21 | 0.1 | 108 | 0.4 | 5 | 0.0 |
| Missing | 2,694 | 94.2 | 141 | 4.9 | 4 | 0.1 | 21 | 0.7 | 1 | 0.0 |
| Mother’s education | ||||||||||
| Middle school <9 years | 10,692 | 96.7 | 311 | 2.8 | 2 | 0.0 | 43 | 0.4 | 6 | 0.1 |
| Middle school 9 years | 58,228 | 95.2 | 2,542 | 4.2 | 69 | 0.1 | 336 | 0.5 | 14 | 0.0 |
| Upper secondary school 1–2 years | 196,062 | 94.4 | 10,251 | 4.9 | 317 | 0.2 | 1,077 | 0.5 | 90 | 0.0 |
| Upper secondary school 3 years | 97,016 | 94.6 | 4,877 | 4.8 | 178 | 0.2 | 449 | 0.4 | 28 | 0.0 |
| College/University <3 years | 96,392 | 94.1 | 5,349 | 5.2 | 192 | 0.2 | 432 | 0.4 | 35 | 0.0 |
| College/University ≥ 3years | 74,794 | 94.6 | 3,875 | 4.9 | 136 | 0.2 | 268 | 0.3 | 32 | 0.0 |
| Post-graduate education | 2,339 | 95.0 | 117 | 4.8 | 2 | 0.1 | 4 | 0.2 | 0 | 0.0 |
| Missing | 3,899 | 96.5 | 120 | 3.0 | 1 | 0.0 | 18 | 0.4 | 2 | 0.0 |
| Father’s education | ||||||||||
| Middle school <9 years | 12,270 | 95.6 | 481 | 3.7 | 15 | 0.1 | 60 | 0.5 | 5 | 0.0 |
| Middle school 9 years | 74,559 | 94.8 | 3,570 | 4.5 | 88 | 0.1 | 426 | 0.5 | 25 | 0.0 |
| Upper secondary school 1–2 years | 219,417 | 94.4 | 11,472 | 4.9 | 381 | 0.2 | 1,136 | 0.5 | 86 | 0.0 |
| Upper secondary school 3 years | 69,312 | 94.6 | 3,473 | 4.7 | 115 | 0.2 | 303 | 0.4 | 29 | 0.0 |
| College/University <3 years | 77,328 | 94.3 | 4,138 | 5.0 | 172 | 0.2 | 359 | 0.4 | 33 | 0.0 |
| College/University ≥ 3years | 70,636 | 94.7 | 3537 | 4.7 | 108 | 0.1 | 265 | 0.4 | 24 | 0.0 |
| Post-graduate education | 6,379 | 95.4 | 284 | 4.2 | 7 | 0.1 | 19 | 0.3 | 1 | 0.0 |
| Missing | 9,521 | 94.4 | 487 | 4.8 | 11 | 0.1 | 59 | 0.6 | 4 | 0.0 |
| Disposable family income | ||||||||||
| 1st Quintile | 108,427 | 95.0 | 4,851 | 4.3 | 128 | 0.1 | 654 | 0.6 | 39 | 0.0 |
| 2nd Quintile | 108,018 | 94.7 | 5,333 | 4.7 | 156 | 0.1 | 500 | 0.4 | 35 | 0.0 |
| 3rd Quintile | 107,623 | 94.3 | 5,825 | 5.1 | 185 | 0.2 | 499 | 0.4 | 44 | 0.0 |
| 4th Quintile | 107,603 | 94.2 | 5,776 | 5.1 | 205 | 0.2 | 541 | 0.5 | 50 | 0.0 |
| 5th Quintile | 107,688 | 94.4 | 5,654 | 5.0 | 223 | 0.2 | 433 | 0.4 | 39 | 0.0 |
| Missing | 63 | 95.5 | 3 | 4.5 | 0 | 0.0 | 0 | 0.0 | 0 | 0.0 |
| Asthma in mother | ||||||||||
| No | 448,547 | 95.3 | 19,730 | 4.2 | 605 | 0.1 | 1,860 | 0.4 | 134 | 0.0 |
| Yes | 90,875 | 91.1 | 7,712 | 7.7 | 292 | 0.3 | 767 | 0.8 | 73 | 0.1 |
| Asthma in father | ||||||||||
| No | 473,073 | 95.0 | 22,047 | 4.4 | 686 | 0.1 | 2,105 | 0.4 | 160 | 0.0 |
| Yes | 66,349 | 91.5 | 5,395 | 7.4 | 211 | 0.3 | 522 | 0.7 | 47 | 0.1 |