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55,984 items of data are available, covering 55,984 participants.
Some values have special meanings defined by Data-Coding 3018
- There are 87 distinct values.
- Mean = 273.679
- Std.dev = 225.184
- 3440 items have value -818 (Prefer not to answer)
- 736 items have value -98 (0 months ago)
- 1005 items have value -97 (0 years ago)
Question asked: Think about the time when those headaches were at their worst. About how long ago, in months, did those headaches begin?
Only asked if Field 120053 was answered yes
Coding 3018 defines 3 special values:
- -818 represents "Prefer not to answer"
- -98 represents "0 months ago"
- -97 represents "0 years ago"
0 Related Data-FieldsThere are no related data-fields
There are no tabulations involving field 120055.
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