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. Author manuscript; available in PMC: 2016 Apr 14.
Published in final edited form as: J Am Geriatr Soc. 2015 Apr 6;63(4):716–721. doi: 10.1111/jgs.13329

Table 2.

Clinical and Sleep Characteristics of Study Participants with and without Persistent Fatigue

No PSF (N= 4866) PSF (N = 1158) Total
N = 6024
P value

DFA
Rarely/Never 2819 (58) 441 (38) 3260 (54)
Some Nights 1131 (23) 311 (27) 1442 (24)
Most nights/Every night 901 (19) 403 (35) 1304 (22) <.001

DSA
Rarely/Never 2959 (61) 487 (42) 3446 (57)
Some Nights 1269 (26) 354 (31) 1623 (27)
Most nights/Every night 624 (13) 311 (27) 935 (16) <.001

Sleep aid use
Rarely/Never 4010 (82) 742 (64) 4752 (79)
Some Nights 279 (6) 94 (8) 373 (6) < .001
Most nights/Every night 570 (12) 316 (27) 886 (15)

No significant pain 2558 (53) 216 (19) 2774 (46)
Pain without activity limitation 1294 (27) 174 (15) 1468 (24)
Pain with activity limitation 1011 (21) 768 (66) 1779 (30) < .001

Pain Medication
Rarely/Never 3135(64) 389 (34) 3524 959)
Sometimes 717 (15) 196 (17) 913 (15)
Often/Always 1009 (21) 572 (49) 1581 (26) < .001

Depression score
< 3 3857 (88) 479 (55) 4336 (83)
>= 3 528 (12) 385 (45) 913 (17) < .001

Physical activity
Yes 1883 (39) 252 (22) 2135 (35)
No 2983 (61) 905 (78) 3886 (65) < .001

Disease Burden
0 – 1 1645 (34) 120 (10) 1765 (29)
2. – 3 2533 (52) 585 (51) 3118 (52)
> 3 688 (14) 453 (39) 1141 (19) < .001

NHATS SPPB score*** 4.7 (6.0) 2.3 (5.9) 4.3 (6.0) < .001

PSF= persistent severe fatigue.

DFA= Difficulty falling asleep.

DSA = Difficulty staying asleep

**

National Health Aging Trends Study Short Physical Performance Battery Test result (Higher result indicate better function)