Data
37,941 items of data are available, covering 26,622 participants.
Some values have special meanings defined by Data-Coding 
487.
Array indices run from 0 to 19.
Units of measurement are shifts.
| 
| Maximum | 31 |  | Decile 9 | 7 |  | Decile 8 | 7 |  | Decile 7 | 5 |  | Decile 6 | 5 |  | Median | 4 |  | Decile 4 | 3 |  | Decile 3 | 2 |  | Decile 2 | 2 |  | Decile 1 | 1 |  | Minimum | 1 |  |   | 
There are 30 distinct values.Mean = 4.27636Std.dev = 3.24684699 items above graph maximum of 131499 items have value -1 (More than a month) | 
Notes
Participants who worked a mix of day and night shifts were asked: 
 "Please tell us about the most common night shift pattern you had during this time: How many night shifts in a row did you usually work before a change of shift or rest day?"
Coding 487 defines 1 special value:
- -1 represents "More than a month"