Table 1.
Demographic characteristics of the populations in the Medical Expenditure Panel Surveys from 1996 to 2011.
| Year | Unweighted sample sizes | Weighted sample sizes | (95% CI) | Mean Age | (95% CI) | Female | (95% CI) | |||
|---|---|---|---|---|---|---|---|---|---|---|
| 1996 | 19,526 | 270,220,553 | (252,162,541–288,278,566) | 34.56 | (33.98–35.14) | 51.14% | (50.44–51.84%) | |||
| 1997 | 12,242 | 272,924,582 | (243,656,703–302,192,462) | 34.65 | (33.91–35.39) | 51.12% | (50.29–51.94%) | |||
| 1998 | 9,956 | 275,276,754 | (240,859,963–309,693,544) | 34.98 | (34.23–35.72) | 51.38% | (50.42–52.34%) | |||
| 1999 | 13,120 | 277,777,364 | (228,792,966–326,761,762) | 34.90 | (34.20–35.59) | 51.27% | (50.52–52.02%) | |||
| 2000 | 10,237 | 282,678,581 | (234,159,408–331,197,754) | 35.36 | (34.62–36.10) | 51.21% | (50.22–52.19%) | |||
| 2001 | 20,823 | 287,502,824 | (256,045,871–318,959,777) | 35.54 | (34.97–36.11) | 51.17% | (50.57–51.78%) | |||
| 2002 | 15,911 | 289,917,944 | (259,399,447–320,436,441) | 35.62 | (35.07–36.17) | 51.02% | (50.26–51.78%) | |||
| 2003 | 15,972 | 292,395,934 | (260,225,236–324,566,631) | 35.80 | (35.21–36.39) | 50.99% | (50.36–51.62%) | |||
| 2004 | 15,839 | 295,173,059 | (268,065,034–322,281,084) | 36.02 | (35.37–36.68) | 51.07% | (50.31–51.83%) | |||
| 2005 | 15,388 | 298,082,232 | (270,107,505–326,056,960) | 36.07 | (35.49–36.66) | 50.91% | (50.14–51.68%) | |||
| 2006 | 16,260 | 299,880,574 | (277,192,459–322,568,689) | 36.20 | (35.60–36.80) | 50.93% | (50.27–51.59%) | |||
| 2007 | 12,237 | 302,814,992 | (282,485,055–323,144,928) | 36.62 | (35.84–37.39) | 51.03% | (50.26–51.79%) | |||
| 2008 | 17,995 | 305,990,159 | (289,452,089–322,528,230) | 36.39 | (35.71–37.08) | 50.79% | (50.05–51.53%) | |||
| 2009 | 15,993 | 307,472,984 | (289,097,025–325,848,943) | 36.61 | (35.99–37.22) | 50.85% | (50.16–51.54%) | |||
| 2010 | 14,338 | 310,617,388 | (293,660,354–327,574,423) | 37.02 | (36.40–37.65) | 51.17% | (50.36–51.97%) | |||
| 2011 | 18,252 | 312,413,749 | (294,383,582–330,443,916) | 37.19 | (36.45–37.92) | 51.09% | (50.40–51.78%) | |||
| All | 244,089 | 4,681,139,673 | (4,502,416,344–4,859,863,002) | 35.88 | (35.67–36.09) | 51.07% | (50.87–51.27%) | |||
| Year | White | (95% CI) | Black | (95% CI) | American Indians/Alaska natives | (95% CI) | Native Hawaiian/Pacific islanders | (95% CI) | Multiple races | (95% CI) |
| 1996 | 81.64% | (79.97–83.31%) | 13.18% | (11.73–14.64%) | 1.30% | (0.87–1.74%) | 3.79% | (3.03–4.56%) | ||
| 1997 | 82.68% | (80.61–84.75%) | 13.08% | (11.11–15.05%) | 0.93% | (0.62–1.24%) | 3.31% | (2.40–4.21%) | ||
| 1998 | 81.37% | (79.03–83.70%) | 13.16% | (11.03–15.30%) | 0.59% | (0.35–0.83%) | 4.87% | (3.65–6.10%) | ||
| 1999 | 82.28% | (79.81–84.75%) | 13.25% | (10.68–15.82%) | 1.13% | (0.53–1.73%) | 3.34% | (2.59–4.09%) | ||
| 2000 | 83.03% | (80.64–85.42%) | 12.97% | (10.60–15.33%) | 0.55% | (0.31–0.79%) | 3.45% | (2.62–4.29%) | ||
| 2001 | 80.11% | (78.47–81.75%) | 12.16% | (10.54–13.77%) | 1.01% | (0.67–1.36%) | 3.95% | (3.19–4.71%) | 1.30% | (1.03–1.58%) |
| 2002 | 81.40% | (79.83–82.96%) | 12.34% | (10.87–13.81%) | 0.79% | (0.53–1.05%) | 3.94% | (3.15–4.72%) | 0.27% | (0.14–0.40%) |
| 2003 | 80.85% | (79.09–82.61%) | 12.47% | (10.79–14.15%) | 0.64% | (0.36–0.92%) | 3.96% | (3.21–4.71%) | 0.34% | (0.15–0.52%) |
| 2004 | 80.28% | (78.34–82.23%) | 12.44% | (10.68–14.19%) | 0.81% | (0.48–1.14%) | 4.25% | (3.39–5.12%) | 0.37% | (0.16–0.57%) |
| 2005 | 80.30% | (78.39–82.20%) | 12.39% | (10.76–14.02%) | 0.78% | (0.41–1.15%) | 4.38% | (3.51–5.25%) | 0.34% | (0.08–0.60%) |
| 2006 | 80.18% | (78.48–81.87%) | 12.41% | (11.02–13.80%) | 0.91% | (0.52–1.30%) | 4.32% | (3.48–5.16%) | 0.44% | (0.19–0.70%) |
| 2007 | 80.50% | (78.44–82.57%) | 12.31% | (10.52–14.11%) | 0.79% | (0.46–1.12%) | 4.28% | (3.44–5.11%) | 0.21% | (0.11–0.31%) |
| 2008 | 79.87% | (78.08–81.66%) | 12.43% | (11.02–13.84%) | 0.78% | (0.41–1.15%) | 4.54% | (3.71–5.37%) | 0.25% | (0.11–0.40%) |
| 2009 | 79.88% | (78.13–81.63%) | 12.54% | (10.98–14.09%) | 0.90% | (0.44–1.36%) | 4.66% | (3.77–5.55%) | 0.29% | (0.15–0.43%) |
| 2010 | 79.56% | (77.57–81.56%) | 12.29% | (10.74–13.84%) | 0.81% | (0.30–1.32%) | 4.96% | (3.92–5.99%) | 0.68% | (0.36–1.00%) |
| 2011 | 79.89% | (78.00–81.77%) | 12.39% | (11.01–13.77%) | 0.01% | –(0.01–0.03%) | 5.14% | (4.00–6.29%) | 0.01% | –(0.01–0.02%) |
| All | 80.82% | (80.07–81.58%) | 12.60% | (11.91–13.29%) | 0.79% | (0.66–0.92%) | 4.21% | (3.88–4.55%) | 0.29% | (0.23–0.34%) |
The category of “multiple races” was introduced in 2001.
*p < 0.001.