First Time Users of PCP (1965 - 2003)

Trends in Initiation of PCP Use (1965 - 2003)

Source: National Survey on Drug Use and Health

Table 4.7A Numbers (in Thousands) of Persons Who Initiated PCP 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 * * * * * *
1966 * * * * * *
1967 * * * * * *
1968 72 68 * 15.3 3.1 *
1969 58 43 * 17.2 1.8 *
1970 171 77 94 18.1 3.4 3.5
1971 264 121 143 19.2 5.2 4.6
1972 343 152 191 18.5 6.5 6.3
1973 352 132 219 19.0 5.6 7.7
1974 447 211 236 18.2 8.7 7.9
1975 409 203 206 18.4 8.5 6.4
1976 489 229 260 19.3 9.7 7.6
1977 433 177 257 19.0 7.6 7.9
1978 407 164 243 20.1 7.2 6.2
1979 350 144 206 18.9 6.5 6.1
1980 278 102 176 20.2 4.6 4.9
1981 247 87 159 19.6 4.1 4.5
1982 234 60 173 21.2 2.8 4.4
1983 157 53 104 19.3 2.6 3.2
1984 121 31 90 19.5 1.5 2.8
1985 116 49 68 18.9 2.4 2.1
1986 124 29 94 20.0 1.4 2.7
1987 101 34 67 20.6 1.7 1.7
1988 94 33 61 21.2 1.7 1.3
1989 117 44 73 20.4 2.3 1.8
1990 71 35 36 21.7 1.8 0.6
1991 81 38 43 20.0 1.9 1.1
1992 85 25 59 19.8 1.3 1.8
1993 89 45 44 19.2 2.2 1.3
1994 94 59 35 17.0 2.9 1.3
1995 145 68 76 18.4 3.2 2.7
1996 131 69 61 17.9 3.1 1.9
1997 124 67 57 17.6 2.8 2.0
1998 105 62 43 17.4 2.6 1.4
1999 149 79 69 17.7 3.3 2.5
2000 166 102 65 17.6 4.1 2.0
2001 177 97 79 17.7 3.9 2.4
20022 141 87 54 17.0 3.4 1.8
20033 136 78 58 17.8 3.0 1.4
*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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