Table 1.
Prevalence of herb and supplement use among the US adult population in 2002, 2007, and 2012.
| Sample size and population estimates | 2002 | 2007 | 2012 | Percentage change | Percentage change | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sample n | Est. N | %a | Sample n | Est. N | %a | Sample n | Est. N | %a | (2002 and 2012) | (2007 and 2012) | |
| Total | 30,427 | 201,674,075 | 100.0% | 22,657 | 216,781,365 | 100.0% | 34,525 | 234,920,670 | 100.0% | ||
| Ever taken any herbal preparations and dietary supplements | 7,655 | 50,613,051 | 25.1% | 5,600 | 55,090,245 | 25.4% | 7,864 | 53,571,888 | 23.6% | −1.5%** | −1.8%** |
| Took herbal preparations and dietary supplements in past 12 months | 5,787 | 38,182,843 | 18.9% | 3,982 | 38,797,215 | 17.9% | 5,974 | 40,579,309 | 17.9% | −1.0%* | 0.0% |
| Took herbal preparations and dietary supplements in past 30 daysb | na | na | na | 2,932 | 28,059,181 | 12.9% | 4,491 | 30,113,788 | 13.3% | na | 0.3% |
Data source: National Center for Health Statistics, 2002, 2007, and 2012 NHIS Adult Complementary and Alternative Medicine File [20–22].
Note: proportions based on weighted prevalence estimates, P values for Wald chi-square tests.
aColumn percentage.
bThe question of the current herb use was only asked in 2007 and 2012 NHIS.
na: not available.
* P < 0.05.
** P < 0.01.