Table 2.
Previous and Subsequent Insomnia Diagnoses Among Subjects with 1-Month Insomnia
| Insomnia duration subtype | Insomnia subtype at any previous interview (n = 131)a,b | Insomnia subtype at any subsequent interview (n = 111)b,c |
|---|---|---|
| 1-month insomnia | 39 (29.8) | 39 (35.1) |
| 2- to 3-week insomnia | 33 (25.2) | 31 (27.9) |
| RBI | 68 (51.9) | 40 (36.0) |
| OBI | 54 (41.2) | 30 (27.0) |
| Any insomnia subtype | 129 (98.5) | 91 (82.0) |
| No insomnia | 1 (0.8) | 20 (18.0) |
Data are presented as number (%). RBI refers to recurrent brief insomnia; OBI, occasional brief insomnia.
a
Percentages do not sum to 100% because subjects could have different diagnoses at different assessment times. Each cell indicates the number (%) of subjects who had a given diagnosis in at least 1 previous (column 1) or subsequent (column 2) interview.
b
Based on subjects having 1-month insomnia at any time and previous interview data
c
Based on subjects having 1-month insomnia at any time and subsequent interview data