1996 National Household Survey on Drug Abuse:  Preliminary Results

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70617 (209A)             PRELIMINARY DATA - AS OF JUNE 1997 

Table 41.Estimated Number (in Thousands) of Persons Who First Used Any Inhalant During Each Year 1962-1995, 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

*

*

0.1

**

**

1963

*

*

0.7

1.4

**

1964

*

*

0.1

**

**

1965

119

15.2

2.4

2.3

**

1966

123

18.8

4.0

**

**

1967

115

15.4

4.1

0.8

**

1968

165

15.5

2.9

2.7

**

1969

146

15.4

4.7

1.2

**

1970

206

18.7

4.6

1.9

**

1971

212

16.8

4.1

3.3

**

1972

324

19.6

4.5

3.3

3.9

1973

288

16.6

5.8

4.1

0.2

1974

365

20.1

5.9

4.4

0.3

1975

304

17.3

6.6

3.6

0.5

1976

415

18.1

7.7

6.2

0.6

1977

462

18.6

8.2

5.6

0.7

1978

525

17.8

9.3

7.3

1.3

1979

416

18.3

8.2

4.9

1.7

1980

551

18.2

9.6

8.1

0.7

1981

485

19.5

7.3

6.5

2.4

1982

406

18.1

7.4

5.2

1.2

1983

411

19.0

7.0

4.8

1.1

1984

385

17.6

8.7

4.5

1.2

1985

358

16.1

9.7

4.5

**

1986

402

17.1

10.5

4.7

0.8

1987

356

16.7

9.1

4.8

0.3

1988

452

18.9

10.4

5.7

1.1

1989

374

17.2

9.7

4.5

0.8

1990

432

16.7

10.8

5.5

0.9

1991

401

15.5

10.7

4.9

**

1992

463

16.3

12.2

6.8

0.1

1993

652

16.4

18.4

9.1

0.3

19942

695

16.5

20.3

9.0

0.2

19953

676

16.0

21.8

7.4

0.3

*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 never 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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