Data
27,693 items of data are available, covering 25,361 participants.
Some values have special meanings defined by Data-Coding
100291.
Defined-instances run from 0 to 3, labelled using Instancing
2.
Units of measurement are years.
| Maximum | 84 |
| Decile 9 | 74 |
| Decile 8 | 70 |
| Decile 7 | 68 |
| Decile 6 | 66 |
| Median | 65 |
| Decile 4 | 63 |
| Decile 3 | 60 |
| Decile 2 | 58 |
| Decile 1 | 52 |
| Minimum | 0 |
|
|
- There are 85 distinct values.
- Mean = 62.914
- Std.dev = 11.1052
- 489 items below graph minimum of 30
- 43 items have value -3 (Prefer not to answer)
- 1261 items have value -1 (Do not know)
|
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
7,777 participants, 7,777 items
| Maximum | 70 |
| Decile 9 | 66 |
| Decile 8 | 65 |
| Decile 7 | 63 |
| Decile 6 | 62 |
| Median | 60 |
| Decile 4 | 59 |
| Decile 3 | 56 |
| Decile 2 | 52 |
| Decile 1 | 45.5 |
| Minimum | 0 |
|
|
- There are 71 distinct values.
- Mean = 57.1469
- Std.dev = 11.4599
- 216 items below graph minimum of 25
- 10 items have value -3 (Prefer not to answer)
- 203 items have value -1 (Do not know)
|
Instance 1 : First repeat assessment visit (2012-13)
1,742 participants, 1,742 items
| Maximum | 75 |
| Decile 9 | 70 |
| Decile 8 | 68 |
| Decile 7 | 66 |
| Decile 6 | 65 |
| Median | 64 |
| Decile 4 | 62 |
| Decile 3 | 60 |
| Decile 2 | 57 |
| Decile 1 | 51 |
| Minimum | 0 |
|
|
- There are 59 distinct values.
- Mean = 61.2647
- Std.dev = 10.2432
- 34 items below graph minimum of 32
- 1 items have value -3 (Prefer not to answer)
- 41 items have value -1 (Do not know)
|
Instance 2 : Imaging visit (2014+)
15,669 participants, 15,669 items
| Maximum | 84 |
| Decile 9 | 75 |
| Decile 8 | 72 |
| Decile 7 | 70 |
| Decile 6 | 69 |
| Median | 67 |
| Decile 4 | 65 |
| Decile 3 | 63 |
| Decile 2 | 60 |
| Decile 1 | 56 |
| Minimum | 0 |
|
|
- There are 81 distinct values.
- Mean = 65.5305
- Std.dev = 10.028
- 224 items below graph minimum of 37
- 28 items have value -3 (Prefer not to answer)
- 877 items have value -1 (Do not know)
|
Instance 3 : First repeat imaging visit (2019+)
2,505 participants, 2,505 items
| Maximum | 84 |
| Decile 9 | 75 |
| Decile 8 | 73 |
| Decile 7 | 70 |
| Decile 6 | 69 |
| Median | 68 |
| Decile 4 | 65 |
| Decile 3 | 64 |
| Decile 2 | 61 |
| Decile 1 | 58 |
| Minimum | 0 |
|
|
- There are 59 distinct values.
- Mean = 66.2156
- Std.dev = 9.54242
- 35 items below graph minimum of 41
- 4 items have value -3 (Prefer not to answer)
- 140 items have value -1 (Do not know)
|
Notes
ACE touchscreen question "What was your age when a cataract was first diagnosed?"
The following checks were performed:
- If answer < 0 then rejected
- If answer > Participants age then rejected
- If answer < 40 then participant asked to confirm
- If answer > 69 then participant asked to confirm
If the participant activated the Help button they were shown the message:
If you are unsure, please provide an estimate or select Do not know.
|
Field 4700 was collected from participants who indicated they have cataract, as defined by their answers to Field 6148
Coding 100291 defines 2 special values:
- -1 represents "Do not know"
- -3 represents "Prefer not to answer"
