Table 1.

Length of stay

		Method 1	Method 2	Method 3	Method 4
Person spells: all specialties	Mean LOS	4.0	3.7	3.7	4.0
	SD LOS	18.2	17.3	17.3	18.4
Person spells: psychiatric specialties	Mean LOS	48.5	46.7	45.8	48.6
	SD LOS	111.5	107.5	106.1	113.1
Results from underlying episodes, so no method for aggregation applied
Episodes: all specialties	Mean LOS	3.0
	SD LOS	12.6
Episodes: psychiatric specialties	Mean LOS	35.5
	SD LOS	79.1
Difference (days LOS) between episode and person spell	All specialties	1.0	0.7	0.7	1.0
	psychiatric specialties	13.1	11.3	10.3	13.2
Difference (%) between episode and person spell	All specialties	34.0	22.3	22.3	34.7
	psychiatric specialties	36.8	31.8	29.1	37.1