Table 1.
Demographic characteristics by insomnia diagnosis.
| Measure | Total (N = 2304) | Insomnia diagnosis | Analysis | |||||
|---|---|---|---|---|---|---|---|---|
| Yes (N = 130) | No (N = 2174) | Test statistic | p | |||||
| Age | 51.4 ± 11.9 | 51.0 ± 10.9 | 51.5 ± 12.0 | t(2302) = 0.41 | 0.685 | |||
| Sex | χ2(1)<0.01 | 0.974 | ||||||
| Male | 2199 | (95.4) | 124 | (5.6) | 2075 | (94.4) | ||
| Female | 105 | (4.6) | 6 | (5.7) | 99 | (94.3) | ||
| Race | χ2(2) = 1.60 | 0.450 | ||||||
| Not Black (white + other)a | 1848 | (82.6) | 111 | (6.0) | 1737 | (94.0) | ||
| Black | 300 | (13.4) | 13 | (4.3) | 287 | (95.7) | ||
| Marital status | χ2(3) = 1.51 | 0.679 | ||||||
| Married | 1225 | (53.2) | 71 | (5.8) | 1154 | (94.2) | ||
| Separated/Divorced | 643 | (27.9) | 31 | (4.8) | 612 | (95.2) | ||
| Never married | 236 | (10.3) | 16 | (6.8) | 220 | (93.2) | ||
| Widowed | 197 | (8.6) | 12 | (6.1) | 185 | (93.9) | ||
| Service branch | χ2(3) = 2.61 | 0.456 | ||||||
| Army | 1421 | (62.1) | 74 | (5.2) | 1347 | (94.8) | ||
| Marine Corps | 493 | (21.6) | 34 | (6.9) | 459 | (93.1) | ||
| Navy | 225 | (9.8) | 15 | (6.7) | 210 | (93.3) | ||
| Air Force | 148 | (6.5) | 7 | (4.7) | 141 | (95.3) | ||
| Service period | χ2(2) = 2.38 | 0.305 | ||||||
| WWII/Korea | 379 | (16.5) | 16 | (4.2) | 363 | (95.8) | ||
| Vietnam/Post-Vietnam | 1665 | (72.4) | 96 | (5.8) | 1569 | (94.2) | ||
| Persian Gulf | 257 | (11.2) | 18 | (7.0) | 239 | (93.0) | ||
| Service duration (years) | 3.39 ± 3.39 | 4.09 ± 4.51 | 3.35 ± 3.31 | U(1) = 3.57 | 0.059 | |||
| Combat | χ2(1) = 1.13 | 0.288 | ||||||
| Yes | 594 | (29.1) | 29 | (4.9) | 565 | (95.1) | ||
| No | 1446 | (70.9) | 88 | (6.1) | 1358 | (93.9) | ||
| Disabled | χ2(1) = 4.17 | 0.041 | ||||||
| Yes | 1844 | (80.0) | 95 | (5.2) | 1749 | (94.8) | ||
| No | 460 | (20.0) | 35 | (7.6) | 425 | (92.4) | ||
| Percent disabled | 54.3 ± 36.8 | 49.5 ± 39.1 | 54.6 ± 36.7 | U(1)= 1.81 | 0.179 | |||
| Sleep medication | χ2(1) = 0.92 | 0.339 | ||||||
| Yes | 1129 | (49.0) | 69 | (6.1) | 1060 | (93.9) | ||
| No | 1175 | (51.0) | 61 | (5.2) | 1114 | (94.8) | ||
Notes: Data are presented as mean ± SD and N (%N). Sleep medication prescribed prior to diagnosis of insomnia.
a
Due to small cell size, other race was combined with white race as they were not significantly different from white race but significantly different from black race.