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. Author manuscript; available in PMC: 2015 Aug 1.
Published in final edited form as: J Consult Clin Psychol. 2014 May 26;82(4):670–683. doi: 10.1037/a0036606

Table 1.

Participant Characteristics at Baseline

CBT
(n = 60)
CT
(n = 65)
BT
(n = 63)
Total
(N = 188)
Statistic
Gender (female) - % (n) 53.3 (32) 69.2 (45) 63.5 (40) 62.2 (117) 3.42, p = .18
Age (yrs) – M (SD) 46.9 (11.3) 46.7 (12.8) 48.5
(13.6)
47.4
(12.6)
0.40, p = .67
Ethnicity (non-caucasian) - % (n) 8.5 (5) 9.2 (6) 3.2 (2) 6.9 (13) 3.61, p = .23
Marital Status - % (n) 1.73, p = .78
Single 33.3 (20) 24.6 (16) 27.0 (17) 28.2 (53)
Married/Partnered 51.7 (31) 53.9 (35) 55.6 (35) 53.7 (101)
Divorced/Separated/Wid
owed
15.0 (9) 21.5 (14) 17.5 (11) 18.1 (34)
Education (yrs) – M (SD) 16.7 (3.0) 15.9 (3.4) 15.5 (3.3) 16.0 (3.2) 2.00, p = .14
Employment - % (n) 7.42, p = .12
Full-part time/student 82.8 (48) 76.6 (49) 67.7 (42) 75.5 (139)
Unemployed 12.1 (7) 6.3 (4) 12.9 (8) 10.3 (19)
Retired 5.2 (3) 17.2 (11) 19.4 (12) 14.1 (26)
Insomnia duration (yrs) – M (SD) 13.8 (11.9) 14.8 (12.9) 14.8
(13.6)
14.5
(12.8)
0.11, p = .90
Insomnia Severity Index– M (SD) 17.9 (3.4) 17.6 (3.5) 18.3 (3.4) 17.9 (3.4) 0.70, p = .50
Type of insomnia - % (n) 9.53, p = .30
Initial 6.7 (4) 4.6 (3) 6.4 (4) 5.9 (11)
Middle 21.7 (13) 29.2 (19) 12.7 (8) 21.3 (40)
Late 3.3 (2) 9.2 (6) 6.4 (4) 6.4 (12)
Mixed 65.0 (39) 56.9 (37) 73.0 (46) 64.9 (122)
Non-restorative 3.3 (2) 0.0 (0) 1.6 (1) 1.6 (3)
Number of
apnea/hypopnea /hour
(PSG) – M (SD)
0.26 (0.86) 0.15 (0.39) 0.14
(0.38)
0.18
(0.58)
0.74, p = .48
Number of PLM
associated with arousals
(PSG) – M (SD)
0.97 (2.64) 0.74 (1.55) 0.52
(1.58)
0.74
(1.98)
0.78, p = .46
Prior medication - % (n)
Antidepressant 1.7 (1) 6.2 (4) 3.2 (2) 3.7 (7) 2.66, p = .26
Hypnotic 35.0 (21) 30.8 (20) 39.7 (25) 35.1 (66) 1.17, p = .57
OTC 20.0 (12) 15.4 (10) 20.6 (13) 18.6 (35) 0.69, p = .71
Comorbidity - % (n)
Medical (any) 59.3 (35) 52.3 (34) 69.8 (44) 60.4 (113) 4.16, p = .13
Psychiatric (any) 25.0 (15) 23.1 (15) 23.8 (15) 23.9 (45) 0.06, p = .97
Anxiety 18.3 (11) 21.5 (14) 23.8 (15) 21.3 (40) 0.55, p = .76
Mood 6.7 (4) 6.2 (4) 6.4 (4) 6.4 (12) 0.01, p = .99
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