1996 National Household Survey on Drug Abuse:  Preliminary Results

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70617 (203A)            PRELIMINARY DATA - AS OF JUNE 1997 

Table 44.Estimated Number (in Thousands) of Persons Who First Used Alcohol During Each Year 1962-1994, Their Mean Age at First Use, and Annual Age-Specific Rates of First Use (per 1000 Person-Years of Exposure), Based on 1994-1996 NHSDAs




AGE-SPECIFIC RATE OF FIRST USE1

YEAR

INITIATES

(1000s)

MEAN

AGE

12-17

18-25

26-34

1962

2199

18.5

48.9

129.3

69.2

1963

2602

17.1

60.7

168.2

11.4

1964

2981

18.5

52.9

219.9

27.0

1965

3144

17.7

65.3

179.0

20.2

1966

3555

17.4

64.3

221.8

43.6

1967

3829

17.5

75.1

226.0

39.2

1968

3902

18.3

73.0

227.2

50.5

1969

4295

17.9

88.6

242.3

54.6

1970

4334

17.2

95.6

263.8

31.0

1971

3888

17.4

79.3

251.2

46.9

1972

4572

16.9

109.8

259.2

29.5

1973

4432

16.9

103.0

261.7

28.3

1974

4370

17.4

106.4

251.5

37.6

1975

4053

17.0

98.4

256.3

20.5

1976

4205

16.8

110.8

240.7

16.2

1977

4303

17.4

109.8

244.9

43.4

1978

4426

16.9

122.0

240.2

41.0

1979

3987

17.2

114.1

225.4

26.8

1980

3919

17.5

113.5

229.3

31.2

1981

3699

16.5

114.4

220.4

19.3

1982

3753

17.2

114.8

213.8

37.1

1983

3634

16.7

115.5

215.1

25.0

1984

3554

17.0

112.5

204.4

30.2

1985

3466

16.6

124.8

197.0

23.0

1986

3586

17.0

123.7

208.6

41.5

1987

3169

17.0

113.3

184.9

16.6

1988

3421

16.8

121.2

194.0

32.1

1989

3207

16.2

120.4

176.8

23.2

1990

3559

16.7

125.7

219.1

19.9

1991

3348

16.5

119.1

207.3

25.6

1992

3631

16.5

140.6

208.3

22.7

19932

4039

16.3

157.7

223.8

15.9

19943

4131

16.6

160.7

239.7

18.4

*Low precision; no estimate reported.

**Estimate rounds to zero.

1The numerator of each rate equals the number of persons who first used the drug in the year (times 1000). The denominator of each rate equals the number of persons who were exposed to risk of first use during the year, weighted by their estimated exposure time measured in years. For example, for the age group 12-17 in 1990, the denominator is the sum of three components:

(1)those persons 12-17 years old in 1990 who first used the drug in 1989 or earlier, times a weight of zero. The weight is zero since they had zero exposure to the risk of first use in 1990.

(2)those who first used the drug in 1990 times a weight of .5. The weight of .5 assumes that these people, on average, first used the drug at midyear and consequently have a half year of exposure (i.e. the first half of the year.)

(3)those who n ever used, or those who first used the drug in 1991 or later, times a weight of one. The weight of one assumes their exposure to the risk of first use during 1990 was for the whole year.

Each person is also weighted by his/her sample weight.

2Estimated using 1995 and 1996 data only.

3Estimated using 1996 data only.

Source: SAMHSA, Office of Applied Studies, National Household Survey on Drug Abuse, 1994-1996.

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