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. Author manuscript; available in PMC: 2023 Aug 9.
Published in final edited form as: Def Peace Econ. 2017 Jul 12;29:10.1080/10242694.2017.1349633. doi: 10.1080/10242694.2017.1349633

Table 5.

Psychiatric disorders and breathing-related sleep disorder by sleep medication.

Co-morbidity Total (N = 2068) Sleep medication Analysis
Yes (N = 915) No (N = 1153) Test statistic p
Psychiatric disorder
Insomnia χ2(1) = 0.17 0.683
 Yes 73 (3.5) 34 (46.6) 39 (53.4)
 No 1995 (96.5) 881 (44.2) 1114 (55.8)
Adjustment χ2(1) = 4.29 0.038
 Yes 174 (8.4) 64 (36.8) 110 (63.2)
 No 1894 (91.6) 851 (44.9) 1043 (55.1)
Anxiety χ2(1) = 3.01 0.083
 Yes 267 (12.9) 105 (39.3) 162 (60.7)
 No 1801 (87.1) 810 (45.0) 991 (55.0)
Bipolar χ2(1) = 2.04 0.153
 Yes 138 (6.7) 53 (38.4) 85 (61.6)
 No 1930 (93.3) 862 (44.7) 1068 (55.3)
Depression χ2(1) = 0.74 0.389
 Yes 281 (13.6) 131 (46.6) 150 (53.4)
 No 1787 (86.4) 784 (43.9) 1003 (56.1)
Alcohol/Substance χ2(1) = 6.68 <0.010
 Yes 186 (9.0) 99 (53.2) 87 (46.8)
 No 1882 (91.0) 816 (43.4) 1066 (56.6)
N Axis I Comorbidities 0.51 ± 0.75 0.49 ± 0.75 0.52 ± 0.76 U(1) = 0.49 0.483
N Axis I Comorbidities χ2(3) = 0.59 0.900
 0 1295 (62.6) 581 (44.9) 714 (55.1)
 1 550 (26.6) 237 (43.1) 313 (56.9)
 2 178 (8.6) 78 (43.8) 100 (56.2)
 3+ 45 (2.2) 19 (42.2) 26 (57.8)
Breathing-related sleep disorder χ2(1) = 42.8 <0.001
 Yes 232 (11.2) 56 (24.1) 176 (75.9)
 No 1836 (88.8) 859 (46.8) 977 (53.2)

Notes: Data are presented as mean ± SD and N (%N). All comorbidities diagnosed prior to prescription of sleep medication.