1996 National Household Survey on Drug Abuse:  Preliminary Results

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70617 (201A)                PRELIMINARY DATA - AS OF JUNE 1997 

Table 45.Estimated Number (in Thousands) of Persons Who First Used A Cigarette 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

2286

15.6

85.7

96.2

19.2

1963

2710

15.0

110.6

85.2

13.5

1964

2950

15.7

96.2

122.8

22.5

1965

3110

16.3

104.6

128.2

21.4

1966

2945

16.2

91.7

138.1

12.6

1967

3350

15.6

115.2

120.8

*

1968

3174

15.1

103.3

111.5

16.1

1969

3355

15.6

111.9

122.9

11.2

1970

3525

15.9

112.4

109.3

28.0

1971

3467

15.1

120.4

99.1

12.7

1972

3819

15.3

124.6

113.1

24.6

1973

3530

15.2

122.6

90.9

10.7

1974

3777

15.1

136.9

82.7

8.8

1975

3681

15.2

131.5

95.9

4.8

1976

3350

15.4

122.9

79.9

7.2

1977

3341

15.6

122.7

89.5

13.3

1978

3100

15.7

113.5

76.0

9.1

1979

2965

15.5

112.4

82.1

7.0

1980

2826

15.8

107.7

73.1

8.8

1981

2812

15.6

109.6

70.0

7.6

1982

2752

15.4

102.7

66.7

12.0

1983

2688

15.2

101.6

67.9

5.5

1984

2623

15.4

98.0

68.2

8.1

1985

2929

15.5

114.2

75.0

9.7

1986

2804

15.5

105.5

81.5

6.7

1987

2567

16.0

98.8

66.1

10.7

1988

2568

15.3

111.8

62.8

7.2

1989

2525

16.6

101.2

59.0

10.8

1990

2711

15.5

106.2

74.4

8.4

1991

2592

16.2

103.4

67.4

14.3

1992

2682

15.5

119.4

64.0

7.4

19932

2892

15.8

122.7

75.7

7.6

19943

3072

15.7

132.4

76.8

6.9

*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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