Table 1.
Distribution of Participant Characteristics, by Glucosamine+Chondroitin Use and Survey Cycle (1999–2004 and 2005–2010)
| Variable | 1999–2004 |
2005–2010 |
||||||
|---|---|---|---|---|---|---|---|---|
| Overall |
No use of glucosamine or chondroitin |
Any use of glucosamine only |
Combined use of glucosamine+chondroitin |
Overall |
No use of glucosamine or chondroitin |
Any use of glucosamine only |
Combined use of glucosamine+chondroitin |
|
| N (Weighted %)a | N (Weighted %) | N (Weighted %) | N (Weighted %) | N (Weighted %)b | N (Weighted %) | N (Weighted %) | N (Weighted %) | |
| Overall | 9931 (100) | 9540 (95.4) | 125 (1.6) | 264 (3.0) | 11,986 (100) | 11,413 (94.6) | 158 (1.5) | 405 (3.9) |
| Age (years) | ||||||||
| 25 to <40 | 2549 (31.8) | 2529 (32.9) | 10 (11.4) | 10 (6.7) | 3150 (29.4) | 3112 (30.7) | 12 (7.5) | 25 (6.5) |
| 40 to <50 | 1939 (23.2) | 1902 (23.7) | 18 (17.0) | 18 (10.9) | 2297 (22.3) | 2237 (22.8) | 22 (10.6) | 36 (13.8) |
| 50 to <60 | 1492 (18.7) | 1423 (18.3) | 22 (26.3) | 47 (28.3) | 2059 (21.2) | 1948 (20.7) | 31 (33.5) | 80 (28.2) |
| 60 to <70 | 1817 (13.5) | 1695 (12.8) | 38 (29.6) | 84 (29.1) | 2154 (14.3) | 1992 (13.5) | 50 (30.6) | 108 (27.6) |
| 70 to <80 | 1305 (8.9) | 1221 (8.5) | 19 (10.9) | 64 (18.6) | 1499 (8.5) | 1366 (8.1) | 30 (12.6) | 101 (16.3) |
| 80+ | 829 (3.9) | 770 (3.8) | 18 (4.7) | 41 (6.3) | 827 (4.4) | 758 (4.2) | 13 (5.3) | 55 (7.7) |
| Sex | ||||||||
| Male | 5034 (49.2) | 4845 (49.3) | 56 (44.0) | 131 (49.3) | 6009 (48.3) | 5718 (48.5) | 72 (40.9) | 213 (46.9) |
| Female | 4897 (50.8) | 4695 (50.7) | 69 (56.0) | 133 (50.7) | 5977 (51.7) | 5695 (51.5) | 86 (59.1) | 192 (53.1) |
| Race/ethnicity | ||||||||
| Non-Hispanic white | 5262 (75.0) | 4952 (74.3) | 99 (91.7) | 210 (89.4) | 6130 (73.5) | 5721 (72.7) | 106 (87.2) | 296 (88.0) |
| Non-Hispanic black | 1762 (9.6) | 1741 (9.9) | 7 (2.6) | 14 (2.1) | 2270 (10.2) | 2226 (10.6) | 9 (2.1) | 35 (2.8) |
| Mexican American | 2183 (6.3) | 2141 (6.5) | 13 (2.1) | 28 (1.9) | 2111 (7.3) | 2058 (7.6) | 22 (4.9) | 31 (2.2) |
| Other | 724 (9.1) | 706 (9.3) | 6 (3.6) | 12 (6.6) | 1475 (9.0) | 1408 (9.1) | 21 (5.7) | 43 (7.1) |
| Education | ||||||||
| Less than high school | 3139 (19.3) | 3079 (19.8) | 19 (6.9) | 39 (11.1) | 3396 (17.8) | 3301 (18.3) | 31 (9.9) | 64 (9.1) |
| High school grad/GED or equivalent | 2355 (25.6) | 2263 (25.8) | 30 (21.4) | 62 (22.3) | 2846 (24.2) | 2724 (24.3) | 35 (29.8) | 86 (20.6) |
| Some college or AA degree | 2487 (29.0) | 2370 (28.9) | 34 (31.1) | 83 (30.7) | 3211 (29.7) | 3038 (29.6) | 44 (27.9) | 122 (31.9) |
| College grad or above | 1950 (26.1) | 1828 (25.5) | 42 (40.6) | 80 (35.9) | 2533 (28.3) | 2350 (27.8) | 48 (32.3) | 133 (38.5) |
| <25 (Underweight/normal) | 2970 (32.8) | 2865 (33.1) | 29 (24.7) | 75 (29.6) | 3219 (29.5) | 3081 (29.7) | 37 (29.8) | 98 (24.0) |
| 25 to <30 (Overweight) | 3697 (35.8) | 3551 (35.8) | 46 (35.0) | 100 (34.9) | 4211 (34.5) | 3992 (34.2) | 70 (40.0) | 146 (38.0) |
| 30 to <35 (Obese) | 1966 (18.8) | 1882 (18.7) | 27 (23.0) | 57 (21.9) | 2596 (20.5) | 2474 (20.6) | 31 (16.5) | 90 (21.7) |
| 35+ (Severely obese) | 1298 (12.6) | 1242 (12.5) | 23 (17.2) | 32 (13.5) | 1960 (15.5) | 1866 (15.5) | 20 (13.7) | 71 (16.3) |
| Smoking | ||||||||
| Never | 4889 (49.1) | 4690 (48.9) | 70 (56.7) | 129 (51.0) | 6171 (51.4) | 5869 (51.4) | 90 (51.2) | 206 (51.4) |
| Former | 2915 (27.8) | 2756 (27.4) | 42 (33.2) | 116 (39.9) | 3281 (26.7) | 3057 (25.9) | 52 (37.3) | 168 (40.0) |
| Current: low (≤15 cigarettes/day) | 1262 (11.9) | 1246 (12.3) | 7 (5.3) | 8 (3.1) | 1590 (12.6) | 1564 (13.0) | 5 (3.1) | 21 (5.7) |
| Current: high (>15 cigarettes/day) | 865 (11.2) | 848 (11.5) | 6 (4.8) | 11 (6.0) | 944 (9.4) | 923 (9.7) | 11 (8.4) | 10 (2.8) |
AA, associate degree; GED, general educational development.