First Time Users of LSD (1965 - 2003)

Trends in Initiation of LSD Use (1965 - 2003)

Source: National Survey on Drug Use and Health

Table 4.6A Numbers (in Thousands) of Persons Who Initiated LSD Use in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs
YEAR NUMBER OF INITIATES (1,000s) MEAN AGE AGE-SPECIFIC RATES1
All Ages Under 18 18 or Older 12-17 18-25
1965 58 * 32 22.7 * 0.9
1966 110 42 69 20.6 2.0 2.6
1967 142 52 91 19.3 2.2 3.4
1968 366 209 157 18.1 9.6 5.3
1969 674 244 431 18.9 10.6 16.8
1970 764 342 422 18.1 15.0 17.1
1971 769 347 422 18.5 15.0 15.1
1972 897 460 437 17.7 20.0 16.3
1973 816 403 413 18.3 17.0 14.6
1974 785 409 376 18.1 17.4 13.4
1975 664 312 352 18.5 13.3 12.2
1976 643 284 360 18.3 12.2 12.9
1977 683 311 372 18.8 13.4 12.9
1978 634 261 373 18.4 11.5 13.0
1979 787 388 399 18.3 17.5 13.0
1980 772 359 414 19.0 16.7 12.6
1981 773 319 455 19.3 15.3 14.2
1982 681 288 393 19.1 13.8 12.4
1983 565 222 343 19.0 10.8 11.8
1984 549 196 353 19.5 9.7 11.2
1985 570 266 303 19.2 13.1 9.1
1986 596 247 350 19.2 12.6 11.5
1987 567 287 280 18.6 14.9 9.4
1988 597 254 343 18.7 13.5 11.9
1989 604 231 373 19.5 12.3 11.6
1990 537 251 286 18.9 13.4 9.8
1991 597 302 296 18.3 16.0 10.9
1992 620 284 336 18.5 14.7 12.4
1993 579 282 297 18.5 14.3 10.6
1994 714 400 314 17.8 19.7 11.8
1995 780 404 376 17.8 19.4 14.8
1996 805 413 392 18.2 19.3 15.0
1997 777 392 385 18.3 17.7 14.9
1998 716 401 314 17.9 17.6 12.1
1999 762 397 365 17.9 17.1 13.8
2000 788 392 396 18.1 16.6 14.7
2001 614 314 300 18.1 13.0 10.9
20022 303 170 133 17.3 6.8 5.0
20033 320 147 173 18.5 5.7 5.4
*Low precision; no estimate reported.
-- Not available.
NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources.
1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years.
2 Estimated using 2003 and 2004 data only.
3 Estimated using 2004 data only.
Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

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