Table 6.

Relative population attributable risk proportions (PARPs)¹ of SF-12 perceived health scales due to the 4 nighttime symptoms² (n = 6,791)

	MCS3	PCS3	SF-6D3
DIS	25.2	7.6	19.6
DMS	23.2	40.7	38.0
EMA	7.0	13.4	12.7
NRS	21.7	37.3	27.9

¹See the text for a description of PARP.

²The symptoms are defined in overlapping subsamples representing respondents with insomnia who have the symptom in the row regardless of whether they also have any of the other 3 symptoms.

³MCS, Mental Component Summary; PCS, Physical Component Summary; SF-6D, a preference-based health utility index that combines information from the MCS and PCS.