Ecological momentary assessment of fatigue, sleepiness, and exhaustion in ESKD

BMC Nephrology

Table 3 Factor loadings of DISS items

	Negative mood	Positive mood	Fatigue/sleepiness	Alert cognition*
Anxious	0.92	−0.01	−0.02	0.15
Stressed	0.86	0.04	0.12	−0.07
Tense	0.90	0.03	0.08	−0.14
Sad	0.86	−0.01	−0.03	−0.01
Irritable	0.77	0.07	0.15	0.00
Forgetful	0.59	0.01	0.19	0.19
Alert	−0.11	0.85	0.05	0.21
Relaxed	0.19	0.82	−0.12	−0.11
Energetic	−0.23	0.77	0.32	−0.12
Calm	0.19	0.84	−0.14	−0.06
Happy	0.11	0.86	−0.07	−0.12
Efficient	−0.08	0.84	0.14	−0.05
Clear-headed	0.01	0.86	−0.06	0.22
Weary	0.27	−0.05	0.52	0.14
Fatigued	0.11	−0.03	0.81	−0.01
Sleepy	0.04	0.00	0.85	−0.01
Exhausted	0.11	0.00	0.88	−0.01
Concentrate^†	0.20	0.22	0.31	0.25
Effort^†	0.08	0.23	0.31	0.12

^†Except as noted, items are of the form, “How _____ do you feel?”.
*Lacked strong factor loadings, but was characterized based on 4 items with largest factor loadings.
Concentrate: actual wording is, “How well are you able to concentrate?”.
Effort: actual wording is, “How much of an effort is it to do anything?”.
DISS daytime symptoms in insomnia scale.
Bolded items denote primary factor loading.

ISSN: 1471-2369