Table 2.
Annual age group-specific incidence and cumulative incidence of visual impairment, severe visual impairment, or blindness per 10 000 children
|
Visual impairment, severe visual impairment, and blindness plus*(n=559) |
Visual impairment, severe visual impairment, and blindness isolated†(n=219) |
All (n=784)‡ |
Total UK population§(1000s) | |||||
|---|---|---|---|---|---|---|---|---|
| n (%) or n | Incidence (95%CI) | n (%) or n | Incidence (95%CI) | n (%) or n | Incidence (95%CI) | |||
| Age-specific incidence | ||||||||
| Age, years | ||||||||
| <1 | 299 (53%) | 3·86 (3·45–4·32) | 99 (45%) | 1·28 (1·05–1·56) | 402¶ (51%) | 5·19 (4·71–5·72) | 774·5 | |
| 1–4 | 151 (27%) | 0·47 (0·40–0·55) | 48 (22%) | 0·15 (0·11–0·20) | 200‖ (26%) | 0·62 (0·54–0·71) | 3231·8 | |
| 5–9 | 57 (10%) | 0·14 (0·11–0·18) | 42 (19%) | 0·10 (0·08–0·14) | 99 (13%) | 0·25 (0·20–0·30) | 4037·4 | |
| 10–15 | 43 (8%) | 0·10 (0·07–0·13) | 25 (11%) | 0·06 (0·04–0·09) | 69‖ (9%) | 0·16 (0·13–0·20) | 4338·3 | |
| 16–18 | 9 (2%) | 0·04 (0·02–0·08) | 5 (2%) | 0·02 (0·01–0·05) | 14 (2%) | 0·06 (0·04–0·10) | 2262·1 | |
| 0–18 | 559 (100%) | 0·38 (0·35–0·41) | 219 (100%) | 0·15 (0·13–0·17) | 784 (100%) | 0·54 (0·50–0·57) | 14644·2 | |
| Cumulative incidence | ||||||||
| Age, years | ||||||||
| 1 | 299 | 3·86 (3·45–4·32) | 99 | 1·28 (1·05–1·56) | 402¶ | 5·19 (4·71–5·72) | .. | |
| 5 | 450 | 5·73 (5·22–6·28) | 147 | 1·87 (1·59–2·20) | 602‖ | 7·67 (7·08–8·30) | .. | |
| 10 | 507 | 6·44 (5·90–7·02) | 189 | 2·39 (2·07–2·76) | 701 | 8·89 (8·26–9·58) | .. | |
| 16 | 550 | 7·03 (6·47–7·64) | 214 | 2·74 (2·40–3·13) | 770‖ | 9·85 (9·17–10·57) | .. | |
| 18 | 559 | 7·15 (6·58–7·77) | 219 | 2·80 (2·46–3·10) | 784 | 10·03 (9·35–10·76) | .. | |
Values are incidence per 10 000 children (95% CI), unless otherwise indicated.
*
Children with an additional major non-ophthalmic disorder or impairment.
†
Children with isolated visual loss (no major non-ophthalmic disorder or impairment).
‡
Includes six children with unknown visual impairment plus or isolated status.
§
Using mid-year 2016 UK population estimates (Office for National Statistics15) by single year of age.
¶
Includes four children with unknown visual impairment plus or isolated status.
‖
Includes one child with unknown visual impairment plus or isolated status.