Table 1.
Demographic and clinical characteristics of study sample, by alcohol risk group.
| Nondrinker n=357,086 | Low-risk drinking n=156,928 | Moderate-risk drinking n = 58,149 | High-risk drinking n=7167 | Total n=579,330 | |
|---|---|---|---|---|---|
| Age, mean (SD) | 77.4 (7.4) | 76.6 (7.3) | 76.6 (7.3) | 71.1 (6.0) | 77.0 (7.4) |
| Male, n (%) | 350,171(98.1%) | 154,903(98.7%) | 57,324(98.6%) | 7149(99.7%) | 569,547(98.3%) |
| Race, n (%) | |||||
| White | 300,743(84.2%) | 139,499(88.9%) | 53,628(92.2%) | 6011(83.9%) | 499,881(86.3%) |
| Nonwhite | 56,343(15.8%) | 17,429(11.1%) | 4521(7.8%) | 1156(16.1%) | 79,449(13.7%) |
| Marital status, n (%) | |||||
| Unmarried | 122,557(34.3%) | 50,326(32.1%) | 19,259(33.1%) | 3944(55.0%) | 196,086(33.8%) |
| Married | 233,301(65.3%) | 106,084(67.6%) | 38,642(66.5%) | 3202(44.7%) | 381,229(65.8%) |
| Missing/unknown | 1228(0.3%) | 518(0.3%) | 248(0.4%) | 21(0.3%) | 2015(0.3%) |
| Copay exempt status, n (%) | |||||
| Copay required | 99,657(27.9%) | 62,095(39.6%) | 25,087(43.1%) | 1679(23.4%) | 188,518(32.5%) |
| Copay exempt | 255,174(71.5%) | 93,883(59.8%) | 32,728(56.3%) | 5444(76.0%) | 387,229(66.8%) |
| Missing/unknown | 2255(0.6%) | 950(0.6%) | 334(0.6%) | 44(0.6%) | 3583(0.6%) |
| Tobacco, n (%) | 47,292(13.2%) | 22,620(14.4%) | 10,888(18.7%) | 3218(44.9%) | 84,018(14.5%) |
| PTSD, n (%) | 19,842(5.6%) | 7053(4.5%) | 2207(3.8%) | 681(9.5%) | 29,783(5.1%) |
| AUD, n (%) | 10,245(2.9%) | 7422(4.7%) | 9314(16.0%) | 4412(61.6%) | 31,393(5.4%) |
| Comorbidity index, mean (SD)a | 3.7 (3.0) | 3.2 (2.9) | 3.1 (2.8) | 3.3 (2.7) | 3.5 (2.9) |
| Past-yr hospitalizations, mean (SD) | 0.5 (1.0) | 0.3 (0.8) | 0.3 (0.8) | 0.5 (1.1) | 0.4 (0.9) |
| Past-yr ED visits, mean (SD) | 1.2 (2.0) | 0.8 (1.6) | 0.8 (1.5) | 1.3 (2.4) | 1.0 (1.9) |
| Index length of Stay, mean (SD) | 4.0 (3.6) | 3.7 (3.3) | 3.7 (3.4) | 4.4 (4.1) | 3.9 (3.5) |
| Any AMA, n (%) | 2145(0.6%) | 755(0.5%) | 301(0.5%) | 150(2.1%) | 3351(0.6%) |
Note: Differences across the four AUDIT-C groups were statistically significant for all characteristics in this table (p< 0.001), based on Chi-square tests for categorical variables and analysis of variance for continuous variables.
a
Prevalence of specific comorbid conditions included in primary analyses available in Appendix 2.