Data
1,054,414 items of data are available, covering 402,661 participants.
Some values have special meanings defined by Data-Coding
13.
Defined-instances run from 0 to 3, labelled using Instancing
2.
Array indices run from 0 to 31.
Units of measurement are years.
Maximum | 2023.7 |
Decile 9 | 2007.5 |
Decile 8 | 2004.5 |
Decile 7 | 2000.5 |
Decile 6 | 1995.5 |
Median | 1990.5 |
Decile 4 | 1984.5 |
Decile 3 | 1977.8 |
Decile 2 | 1969.7 |
Decile 1 | 1960 |
Minimum | 1937.96 |
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|
- Mean = 1987.26
- Std.dev = 17.9811
- 57 items have value -3 (Preferred not to answer)
- 11351 items have value -1 (Date uncertain or unknown)
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4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
391,155 participants, 859,364 items
Maximum | 2010.71 |
Decile 9 | 2006.5 |
Decile 8 | 2003.5 |
Decile 7 | 1999.5 |
Decile 6 | 1994.5 |
Median | 1989.5 |
Decile 4 | 1983.5 |
Decile 3 | 1977.3 |
Decile 2 | 1969.5 |
Decile 1 | 1959.5 |
Minimum | 1937.96 |
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|
- Mean = 1986.13
- Std.dev = 17.3063
- 53 items have value -3 (Preferred not to answer)
- 8553 items have value -1 (Date uncertain or unknown)
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Instance 1 : First repeat assessment visit (2012-13)
16,273 participants, 35,179 items
Maximum | 2013.43 |
Decile 9 | 2010.5 |
Decile 8 | 2007.5 |
Decile 7 | 2002.5 |
Decile 6 | 1997.5 |
Median | 1991.5 |
Decile 4 | 1985.5 |
Decile 3 | 1978.5 |
Decile 2 | 1969.5 |
Decile 1 | 1958.5 |
Minimum | 1938.62 |
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|
- Mean = 1988.19
- Std.dev = 19.001
- 1 items have value -3 (Preferred not to answer)
- 103 items have value -1 (Date uncertain or unknown)
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Instance 2 : Imaging visit (2014+)
56,312 participants, 136,705 items
Maximum | 2023.7 |
Decile 9 | 2017.3 |
Decile 8 | 2013.5 |
Decile 7 | 2008.5 |
Decile 6 | 2003.5 |
Median | 1997.4 |
Decile 4 | 1990.5 |
Decile 3 | 1983 |
Decile 2 | 1973.5 |
Decile 1 | 1962.7 |
Minimum | 1939.5 |
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|
- Mean = 1993.54
- Std.dev = 20.1239
- 3 items have value -3 (Preferred not to answer)
- 2192 items have value -1 (Date uncertain or unknown)
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Instance 3 : First repeat imaging visit (2019+)
5,146 participants, 11,758 items
Maximum | 2023.5 |
Decile 9 | 2018.5 |
Decile 8 | 2014.5 |
Decile 7 | 2009.5 |
Decile 6 | 2003.5 |
Median | 1997.4 |
Decile 4 | 1990.5 |
Decile 3 | 1983.6 |
Decile 2 | 1974.4 |
Decile 1 | 1963.95 |
Minimum | 1939.56 |
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- Mean = 1994.22
- Std.dev = 20.0014
- 503 items have value -1 (Date uncertain or unknown)
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