Year | Overall (2003–2011) | 2003 | 2011 | p value‡ | |||
---|---|---|---|---|---|---|---|
Sample size, unweighted N | 271,403 | 27,626 | 28,692 | ||||
Weighted N | 1,284,276 | 128,277 | 131,371 | ||||
Weighted column, % | % | (95% CI) | % | (95% CI) | % | (95% CI) | |
Mean of age, years | 38.79 | 38.29–39.29 | 37.24 | 35.91–38.57 | 39.94 | 38.17–41.71 | 0.017 |
Age group, years |  |  |  |  |  |  | < 0.001 |
 12–17 | 0.73 | (0.45–1.18) | 1.19 | (0.57–2.48) | 0.53 | (0.17–1.63) |  |
 18–25 | 13.95 | (12.82–15.17) | 14.94 | (11.16–19.72) | 14.89 | (11.65–18.83) |  |
 26–34 | 22.53 | (21.54–23.54) | 24.92 | (22.90–27.05) | 23.02 | (19.46–27.01) |  |
 35–49 | 45.01 | (43.45–46.58) | 46.74 | (42.32–51.20) | 36.99 | (33.03–41.13) |  |
 50–64 | 16.24 | (15.21–17.32) | 10.93 | (9.21–12.92) | 22.17 | (18.38–26.50) |  |
 65+ | 1.55 | (1.36–1.76) | 1.29 | (0.83–1.99) | 2.41 | (1.71–3.37) |  |
Sex | Â | Â | Â | Â | Â | Â | 0.286 |
 Male | 65.27 | (63.97–66.55) | 63.02 | (60.03–65.92) | 64.82 | (61.52–67.98) |  |
 Female | 34.60 | (33.34–35.89) | 36.69 | (33.85–39.62) | 35.10 | (31.96–38.38) |  |
Race/Ethnicity | Â | Â | Â | Â | Â | Â | 0.001 |
 White, non-Hispanic | 44.77 | (41.18–48.41) | 44.57 | (34.68–54.90) | 53.98 | (42.42–65.13) |  |
 Black, non-Hispanic | 20.74 | (17.78–24.05) | 14.58 | (9.80–21.14) | 27.19 | (17.69–39.36) |  |
 Hispanic | 9.63 | (7.69–12.00) | 8.13 | (5.10–12.74) | 7.60 | (5.03–11.33) |  |
 Asian/Pacific-Islander/Native-American | 0.67 | (0.52–0.87) | 0.34 | (0.21–0.55) | 0.99 | (0.47–2.10) |  |
 Other races, non-Hispanic | 3.85 | (2.80–5.27) | 4.30 | (1.59–11.11) | 3.87 | (1.81–8.09) |  |
 Unknowna | 16.78 | (13.46-20.72) | 23.28 | (12.83–38.47) | 4.40 | (1.72–10.77) |  |
Household income | Â | Â | Â | Â | Â | Â | 0.731 |
 Lowest quartile | 36.41 | (33.55–39.36) | 33.25 | (25.96–41.43) | 33.51 | (26.23–41.67) |  |
 2nd quartile | 20.75 | (19.46–22.11) | 24.98 | (21.17–29.23) | 21.09 | (17.64–25.00) |  |
 3rd quartile | 18.72 | (17.28–20.26) | 20.27 | (16.26–24.96) | 20.60 | (17.47–24.13) |  |
 Highest quartile | 17.66 | (15.96–19.49) | 17.14 | (13.29–21.82) | 19.39 | (15.16–24.47) |  |
Primary expected payer | Â | Â | Â | Â | Â | Â | 0.219 |
 Medicare | 11.89 | (11.10–12.74) | 11.19 | (8.45–14.67) | 14.02 | (10.85–17.92) |  |
 Medicaid | 39.89 | (36.03–43.87) | 28.68 | (19.99–39.28) | 40.37 | (30.77–50.76) |  |
 Private | 22.72 | (20.44–25.18) | 28.86 | (21.43–37.64) | 21.74 | (15.95–28.91) |  |
 Self-pay | 18.53 | (15.78–21.62) | 19.65 | (11.64–31.22) | 17.66 | (10.19–28.85) |  |
 Other payers | 6.76 | (5.48–8.32) | 11.52 | (6.34–20.02) | 6.04 | (3.48–10.30) |  |
Hospital region | Â | Â | Â | Â | Â | Â | 0.793 |
 Northeast | 44.02 | (38.66–49.51) | 41.70 | (26.61–58.53) | 36.80 | (23.99–51.78) |  |
 Midwest | 20.44 | (16.44–25.12) | 20.71 | (11.21–35.08) | 18.15 | (8.62–34.25) |  |
 South | 25.02 | (21.12–29.38) | 22.87 | (14.38–34.35) | 31.51 | (20.13–45.64) |  |
 West | 10.52 | (8.60–12.81) | 14.72 | (8.65–23.92) | 13.54 | (7.25–23.90) |  |
Hospital location | Â | Â | Â | Â | Â | Â | 0.126 |
 Rural | 6.99 | (5.36–9.07) | 10.81 | (4.90–22.17) | 5.05 | (2.70–9.27) |  |
 Urban | 92.88 | (90.80–94.52) | 89.19 | (77.83–95.10) | 94.83 | (90.61–97.22) |  |
Detoxification procedure array | Â | Â | Â | Â | Â | Â | 0.817 |
 Primary procedure | 96.48 | (95.74–97.10) | 96.57 | (94.85–97.73) | 96.83 | (94.65–98.14) |  |
 Secondary procedure | 3.52 | (2.90–4.26) | 3.43 | (2.27–5.15) | 3.17 | (1.86–5.35) |  |
Detoxification and treatment | Â | Â | Â | Â | Â | Â | 0.157 |
 Drug detoxification-only | 87.45 | (84.58–89.85) | 79.82 | (68.08–88.01) | 88.47 | (79.32–93.88) |  |
 Drug detoxification plus rehabilitation | 12.55 | (10.15–15.42) | 20.18 | (11.99–31.92) | 11.53 | (6.12–20.68) |  |
Discharge statusb | Â | Â | Â | Â | Â | Â | 0.007 |
 Routine discharge | 76.65 | (75.23–78.00) | 79.06 | (76.04–81.80) | 75.01 | (69.62–79.72) |  |
 Transfer to further treatment | 9.44 | (8.41–10.57) | 6.79 | (4.92–9.30) | 12.57 | (8.91–17.44) |  |
 Discharges against medical advice (DAMA) | 13.67 | (12.69–14.72) | 13.62 | (11.29–16.33) | 12.30 | (10.00–15.05) |  |