Table 1. Characteristics of US Adults 20 Years or Older, 1999 to March 2020.
| Characteristic | NHANES cycle, No. of participants (weighted %)a | P value | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1999-2000 (n = 3967) | 2001-2002 (n = 4295) | 2003-2004 (n = 4120) | 2005-2006 (n = 4184) | 2007-2008 (n = 5001) | 2009-2010 (n = 5196) | 2011-2012 (n = 4372) | 2013-2014 (n = 4740) | 2015-2016 (n = 4652) | 2017 to March 2020 (n = 7325) | ||
| Age group, y | |||||||||||
| 20-34 | 1056 (29.5) | 1179 (27.3) | 1112 (29.2) | 1268 (27.5) | 1166 (27.5) | 1296 (27.3) | 1209 (27.9) | 1251 (27.9) | 1178 (27.5) | 1704 (27.6) | <.001 |
| 35-49 | 964 (31.1) | 1178 (33.7) | 956 (28.7) | 1064 (30.1) | 1252 (30.0) | 1350 (28.6) | 1028 (25.6) | 1209 (25.6) | 1124 (24.5) | 1721 (24.6) | |
| 50-64 | 892 (21.3) | 952 (23.0) | 852 (24.5) | 903 (24.7) | 1307 (25.8) | 1306 (26.6) | 1169 (28.5) | 1230 (27.7) | 1212 (26.7) | 2119 (26.5) | |
| ≥65 | 1055 (18.0) | 986 (16.0) | 1200 (17.6) | 949 (17.7) | 1276 (16.6) | 1244 (17.5) | 966 (18.0) | 1050 (18.8) | 1138 (21.4) | 1781 (21.3) | |
| Sex | |||||||||||
| Women | 2100 (51.7) | 2238 (51.4) | 2131 (51.8) | 2173 (51.7) | 2536 (53.0) | 2634 (51.0) | 2154 (50.6) | 2443 (51.1) | 2389 (51.5) | 3741 (51.4) | .87 |
| Men | 1867 (48.3) | 2057 (48.6) | 1989 (48.2) | 2011 (48.3) | 2465 (47.0) | 2562 (49.0) | 2218 (49.4) | 2297 (48.9) | 2263 (48.5) | 3584 (48.6) | |
| Race and ethnicity | |||||||||||
| Mexican American | 1058 (7.2) | 903 (6.6) | 810 (7.5) | 834 (7.7) | 858 (8.3) | 956 (8.4) | 409 (7.5) | 625 (9.0) | 815 (8.7) | 845 (8.3) | .08 |
| Non-Hispanic Black | 715 (10.3) | 800 (10.4) | 792 (11.0) | 919 (11.1) | 1026 (11.1) | 908 (11.1) | 1163 (11.3) | 942 (11.1) | 968 (10.6) | 1948 (11.3) | |
| Non-Hispanic White | 1814 (70.5) | 2275 (73.7) | 2242 (73.9) | 2143 (73.8) | 2386 (70.9) | 2547 (69.6) | 1716 (67.7) | 2128 (66.5) | 1617 (65.4) | 2661 (63.0) | |
| Otherb | 380 (12.0) | 317 (9.3) | 276 (7.6) | 288 (7.5) | 731 (9.7) | 785 (11.0) | 1084 (13.5) | 1045 (13.3) | 1252 (15.3) | 1871 (17.5) | |
| Educational levelc | |||||||||||
| Less than high school | 1496 (24.3) | 1237 (18.2) | 1156 (16.9) | 1108 (16.4) | 1509 (19.6) | 1432 (18.3) | 973 (15.5) | 946 (14.4) | 1052 (13.2) | 1253 (10.1) | <.001 |
| High school or equivalent | 900 (26.3) | 1002 (24.8) | 1029 (26.5) | 1016 (25.3) | 1228 (25.5) | 1205 (22.6) | 923 (20.1) | 1060 (21.9) | 1033 (21.1) | 1771 (27.5) | |
| College or above | 1561 (49.4) | 2054 (57.0) | 1932 (56.6) | 2060 (58.3) | 2260 (54.9) | 2550 (59.1) | 2473 (64.4) | 2733 (63.7) | 2566 (65.7) | 4295 (62.4) | |
| Family income-poverty ratio leveld | |||||||||||
| <1.30 | 1028 (23.3) | 1018 (19.6) | 1107 (20.8) | 1016 (17.1) | 1359 (20.6) | 1526 (21.2) | 1381 (24.1) | 1473 (24.4) | 1333 (20.7) | 1766 (19.1) | .29 |
| 1.30-3.49 | 1312 (35.5) | 1566 (35.1) | 1540 (37.2) | 1577 (37.3) | 1780 (33.8) | 1795 (35.3) | 1409 (34.0) | 1532 (34.5) | 1703 (36.7) | 2506 (34.0) | |
| ≥3.50 | 1085 (41.1) | 1438 (45.3) | 1258 (42.0) | 1420 (45.6) | 1431 (45.6) | 1423 (43.4) | 1256 (41.8) | 1411 (41.2) | 1180 (42.6) | 2158 (46.9) | |
Abbreviation: NHANES, National Health and Nutrition Examination Survey.
a
Percentages were adjusted for NHANES survey weights.
b
Includes non-Hispanic Asian, other Hispanic, and more than 1 race.
c
Data were missing for 38 participants.
d
Data were missing for 4065 participants. The variable was calculated by dividing family income by the poverty guidelines. A higher ratio represents a higher level of income.