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Youth Substance  Use: State Estimates From the 1999 National Household Survey on Drug Abuse

Appendix C: Sample-Based Estimates

In this report, the State estimates include both model-based estimates and sample-based estimates. The tables in this appendix represent sample-based estimates, which were restricted to scales and other continuous data that resulted in more precise estimates than questions having only "yes" or "no" answers. Still, the smaller sample sizes in the 42 States and the District of Columbia and the wide range of responses for some of the variables sometimes resulted in sample-based estimates with sizable sampling errors. Therefore, it is important to use the 95 percent confidence interval associated with each State sample-based estimate when making inferences about it.

The sample-based estimates in the average age at first use tables (Tables C.1, C.3, C.5, C.12, C.16, C.17, C.18) are based on special considerations. Specifically, when estimating the average age at first use, using only those who were 12 to 17 in 1999 was also considered because their earlier behavior would have a more direct bearing on their current use. However, there was concern that, for some youths, the age at first use might have occurred as early as 1990 or as late as 1999, and thus not present a summary of more "recent" experience. In addition, given the small age span, there is little differentiation in the average age at first use, which makes it difficult to analyze differences in the patterns in different subgroups. For example, in 1999, the average ages at first use among youths aged 12 to 17 were 12.3 years for cigarettes, 12.9 years for alcohol, and 13.6 years for marijuana (data not shown in tables). Even if the measures were limited to youths aged 12 to 17, the true average age at first use among all youths (i.e., persons aged 0 to 17) would be significantly underestimated for cigarettes and alcohol because significant numbers of youths aged 10 and 11 initiate alcohol or cigarettes. For these reasons, the summary was limited to relatively "recent" initiation in the years 1995 to 1997, even though it would be less directly related to "explaining" current use among youths.

10629

Table C.1 Average Age at First Alcohol Use Among Persons Reporting First Use of Alcohol at Age 25 or Younger in 1995 to 1997, by State: 1999

State

Average Age

95% C.I.

State

Average Age

95% C.I.

National

15.7

(15.6 -15.8)

Missouri

15.6

(14.6 -16.6)

Alabama

15.6

(14.8 -16.3)

Montana

14.8

(14.5 -15.1)

Alaska

15.3

(14.7 -15.8)

Nebraska

15.6

(15.0 -16.2)

Arizona

15.1

(14.3 -15.8)

Nevada

15.1

(14.4 -15.8)

Arkansas

15.5

(14.8 -16.2)

New Hampshire

15.5

(14.6 -16.5)

California

15.7

(15.5 -16.0)

New Jersey

15.9

(15.4 -16.4)

Colorado

15.1

(14.5 -15.6)

New Mexico

15.8

(15.1 -16.4)

Connecticut

15.6

(14.6 -16.5)

New York

15.5

(15.1 -16.0)

Delaware

15.6

(15.0 -16.1)

North Carolina

15.7

(15.3 -16.2)

District of Columbia

16.5

(15.3 -17.7)

North Dakota

15.1

(14.4 -15.8)

Florida

15.9

(15.5 -16.3)

Ohio

15.5

(15.3 -15.8)

Georgia

16.0

(15.4 -16.6)

Oklahoma

15.1

(14.3 -15.9)

Hawaii

15.4

(14.8 -16.1)

Oregon

15.3

(14.6 -16.1)

Idaho

15.7

(15.3 -16.1)

Pennsylvania

15.8

(15.5 -16.1)

Illinois

15.8

(15.4 -16.2)

Rhode Island

14.9

(14.3 -15.4)

Indiana

16.2

(15.8 -16.6)

South Carolina

16.2

(15.4 -17.0)

Iowa

15.8

(15.0 -16.5)

South Dakota

15.1

(14.7 -15.4)

Kansas

15.4

(14.8 -16.0)

Tennessee

16.0

(15.5 -16.5)

Kentucky

15.7

(15.3 -16.1)

Texas

15.8

(15.5 -16.1)

Louisiana

15.5

(14.7 -16.2)

Utah

15.7

(15.1 -16.3)

Maine

15.6

(15.0 -16.2)

Vermont

15.0

(14.5 -15.5)

Maryland

15.7

(14.7 -16.7)

Virginia

16.0

(15.5 -16.6)

Massachusetts

15.6

(15.1 -16.2)

Washington

15.4

(14.7 -16.2)

Michigan

15.7

(15.4 -16.0)

West Virginia

15.6

(15.1 -16.2)

Minnesota

15.6

(15.2 -16.0)

Wisconsin

15.4

(15.0 -15.7)

Mississippi

16.3

(15.8 -16.8)

Wyoming

15.2

(14.3 -16.1)

*Low precision; no estimate reported.

Source: SAMHSA, Office of Applied Studies, National Household Survey on Drug Abuse, 1999 CAI.

10702

Table C.2 Average Scale Scores of Alcohol Dependence Among Persons Aged 12 to 17, by State: 1999

State

Average Score

95% C.I.

State

Average Score

95% C.I.

National

0.58

(0.56 -0.60)

Missouri

0.54

(0.39 -0.70)

Alabama

0.47

(0.32 -0.62)

Montana

0.84

(0.68 -1.00)

Alaska

0.65

(0.50 -0.80)

Nebraska

0.58

(0.44 -0.73)

Arizona

0.76

(0.58 -0.94)

Nevada

0.73

(0.56 -0.89)

Arkansas

0.61

(0.48 -0.74)

New Hampshire

0.59

(0.45 -0.74)

California

0.56

(0.50 -0.63)

New Jersey

0.60

(0.44 -0.76)

Colorado

0.70

(0.54 -0.87)

New Mexico

0.67

(0.48 -0.87)

Connecticut

0.72

(0.52 -0.93)

New York

0.61

(0.49 -0.72)

Delaware

0.73

(0.52 -0.95)

North Carolina

0.47

(0.34 -0.60)

District of Columbia

0.50

(0.17 -0.84)

North Dakota

0.96

(0.74 -1.17)

Florida

0.44

(0.37 -0.51)

Ohio

0.54

(0.47 -0.61)

Georgia

0.49

(0.41 -0.58)

Oklahoma

0.53

(0.38 -0.68)

Hawaii

0.55

(0.37 -0.74)

Oregon

0.60

(0.43 -0.77)

Idaho

0.53

(0.42 -0.64)

Pennsylvania

0.54

(0.47 -0.61)

Illinois

0.61

(0.53 -0.69)

Rhode Island

0.56

(0.40 -0.71)

Indiana

0.56

(0.46 -0.66)

South Carolina

0.55

(0.39 -0.72)

Iowa

0.73

(0.61 -0.84)

South Dakota

0.80

(0.62 -0.99)

Kansas

0.52

(0.36 -0.67)

Tennessee

0.40

(0.29 -0.52)

Kentucky

0.54

(0.43 -0.66)

Texas

0.59

(0.52 -0.66)

Louisiana

0.60

(0.41 -0.78)

Utah

0.37

(0.24 -0.49)

Maine

0.54

(0.39 -0.69)

Vermont

0.60

(0.46 -0.73)

Maryland

0.64

(0.48 -0.80)

Virginia

0.46

(0.32 -0.60)

Massachusetts

0.78

(0.60 -0.96)

Washington

0.57

(0.43 -0.71)

Michigan

0.55

(0.49 -0.61)

West Virginia

0.62

(0.45 -0.78)

Minnesota

0.63

(0.45 -0.80)

Wisconsin

0.76

(0.60 -0.92)

Mississippi

0.66

(0.51 -0.81)

Wyoming

0.77

(0.63 -0.91)

*Low precision; no estimate reported.

NOTE: A respondent who answered "Yes" to three or more of the seven alcohol criteria for dependence listed in the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV) would be considered alcohol dependent. Respondents were assigned a score of 1 if they answered "no" to all seven questions, and a score of 8 if they answered "yes" to all the questions. A respondent who has not used alcohol in the past year was assigned a score of zero.

Source: SAMHSA, Office of Applied Studies, National Household Survey on Drug Abuse, 1999 CAI.

10629

Table C.3 Average Age at First Cigarette Use Among Persons Reporting First Use of Cigarettes at Age 25 or Younger in 1995 to 1997, by State: 1999

State

Average Age

95% C.I.

State

Average Age

95% C.I.

National

15.0

(14.9 -15.1)

Missouri

15.2

(14.5 -15.9)

Alabama

15.0

(14.1 -15.9)

Montana

14.4

(13.8 -14.9)

Alaska

14.4

(13.7 -15.1)

Nebraska

15.4

(14.7 -16.0)

Arizona

14.4

(13.5 -15.3)

Nevada

14.1

(13.3 -14.9)

Arkansas

15.2

(13.7 -16.8)

New Hampshire

16.6

(15.3 -18.0)

California

15.4

(15.1 -15.8)

New Jersey

15.3

(14.7 -15.8)

Colorado

14.2

(13.5 -15.0)

New Mexico

14.8

(14.3 -15.3)

Connecticut

15.2

(14.0 -16.4)

New York

15.5

(14.9 -16.1)

Delaware

14.4

(13.8 -14.9)

North Carolina

14.8

(13.9 -15.7)

District of Columbia

16.0

(15.2 -16.8)

North Dakota

15.2

(14.4 -15.9)

Florida

14.9

(14.5 -15.2)

Ohio

15.3

(14.9 -15.6)

Georgia

14.7

(14.0 -15.4)

Oklahoma

14.8

(13.7 -15.9)

Hawaii

15.5

(14.1 -16.8)

Oregon

14.7

(13.3 -16.0)

Idaho

14.5

(13.9 -15.2)

Pennsylvania

14.7

(14.4 -15.1)

Illinois

15.2

(14.9 -15.6)

Rhode Island

14.2

(13.4 -15.0)

Indiana

15.0

(14.2 -15.9)

South Carolina

15.0

(14.0 -16.0)

Iowa

15.3

(14.6 -16.1)

South Dakota

15.3

(14.1 -16.5)

Kansas

15.4

(14.5 -16.3)

Tennessee

14.9

(14.4 -15.5)

Kentucky

14.2

(13.6 -14.8)

Texas

15.0

(14.7 -15.3)

Louisiana

15.0

(13.9 -16.1)

Utah

15.3

(14.2 -16.3)

Maine

15.1

(14.4 -15.8)

Vermont

14.9

(14.0 -15.9)

Maryland

14.7

(13.8 -15.7)

Virginia

14.8

(14.2 -15.5)

Massachusetts

14.6

(14.1 -15.1)

Washington

15.1

(13.9 -16.3)

Michigan

15.0

(14.5 -15.5)

West Virginia

15.1

(14.7 -15.6)

Minnesota

14.8

(14.1 -15.4)

Wisconsin

14.8

(14.3 -15.3)

Mississippi

14.6

(13.8 -15.4)

Wyoming

14.5

(13.9 -15.2)

*Low precision; no estimate reported.

Source: SAMHSA, Office of Applied Studies, National Household Survey on Drug Abuse, 1999 CAI.

10702

Table C.4 Average Scale Scores of Cigarette Dependence Among Persons Aged 12 to 17, by State: 1999

State

Average Score

95% C.I.

State

Average Score

95% C.I.

National

0.56

(0.54 -0.58)

Missouri

0.59

(0.39 -0.78)

Alabama

0.58

(0.35 -0.80)

Montana

0.84

(0.65 -1.02)

Alaska

0.64

(0.45 -0.83)

Nebraska

0.53

(0.38 -0.68)

Arizona

0.60

(0.40 -0.81)

Nevada

0.63

(0.35 -0.92)

Arkansas

0.80

(0.56 -1.04)

New Hampshire

0.51

(0.33 -0.69)

California

0.36

(0.32 -0.41)

New Jersey

0.46

(0.34 -0.58)

Colorado

0.66

(0.44 -0.88)

New Mexico

0.65

(0.38 -0.91)

Connecticut

0.54

(0.33 -0.76)

New York

0.46

(0.34 -0.57)

Delaware

0.93

(0.64 -1.22)

North Carolina

0.71

(0.44 -0.98)

District of Columbia

0.31

(0.12 -0.51)

North Dakota

0.87

(0.75 -0.99)

Florida

0.39

(0.31 -0.47)

Ohio

0.65

(0.55 -0.75)

Georgia

0.64

(0.50 -0.78)

Oklahoma

0.68

(0.51 -0.85)

Hawaii

0.54

(0.30 -0.78)

Oregon

0.57

(0.35 -0.79)

Idaho

0.48

(0.31 -0.65)

Pennsylvania

0.63

(0.52 -0.74)

Illinois

0.62

(0.54 -0.69)

Rhode Island

0.52

(0.28 -0.75)

Indiana

0.58

(0.40 -0.77)

South Carolina

0.77

(0.54 -1.00)

Iowa

0.74

(0.53 -0.94)

South Dakota

0.65

(0.49 -0.82)

Kansas

0.54

(0.35 -0.72)

Tennessee

0.53

(0.41 -0.66)

Kentucky

0.82

(0.56 -1.07)

Texas

0.50

(0.44 -0.56)

Louisiana

0.71

(0.52 -0.90)

Utah

0.38

(0.23 -0.52)

Maine

0.65

(0.47 -0.83)

Vermont

0.58

(0.39 -0.78)

Maryland

0.65

(0.48 -0.82)

Virginia

0.50

(0.33 -0.68)

Massachusetts

0.74

(0.54 -0.94)

Washington

0.54

(0.36 -0.73)

Michigan

0.57

(0.48 -0.66)

West Virginia

0.91

(0.63 -1.19)

Minnesota

0.78

(0.48 -1.08)

Wisconsin

0.61

(0.48 -0.75)

Mississippi

0.79

(0.57 -1.01)

Wyoming

0.61

(0.48 -0.73)

*Low precision; no estimate reported.

NOTE: A respondent who answered "Yes" to three or more of the seven cigarette criteria for dependence listed in the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV) would be considered cigarette dependent. Respondents were assigned a score of 1 if they answered "no" to all seven questions, and a score of 8 if they answered "yes" to all the questions. A respondent who has not used cigarettes in the past year was assigned a score of zero.

Source: SAMHSA, Office of Applied Studies, National Household Survey on Drug Abuse, 1999 CAI.

10629

Table C.5 Average Age at First Marijuana Use Among Persons Reporting First Use of Marijuana at Age 25 or Younger in 1995 to 1997, by State: 1999

State

Average Age

95% C.I.

State

Average Age

95% C.I.

National

16.2

(16.1 -16.4)

Missouri

16.2

(15.3 -17.0)

Alabama

16.6

(15.6 -17.6)

Montana

15.1

(14.5 -15.7)

Alaska

16.0

(14.8 -17.2)

Nebraska

16.1

(15.0 -17.1)

Arizona

15.3

(14.4 -16.2)

Nevada

15.1

(14.3 -15.8)

Arkansas

15.9

(15.4 -16.4)

New Hampshire

16.5

(14.7 -18.2)

California

16.1

(15.8 -16.4)

New Jersey

16.9

(16.0 -17.7)

Colorado

15.9

(15.2 -16.6)

New Mexico

15.9

(15.1 -16.7)

Connecticut

16.8

(15.1 -18.6)

New York

16.7

(16.1 -17.3)

Delaware

16.2

(15.2 -17.1)

North Carolina

16.1

(15.6 -16.7)

District of Columbia

16.4

(15.0 -17.8)

North Dakota

16.9

(16.0 -17.7)

Florida

16.1

(15.6 -16.6)

Ohio

16.6

(16.2 -17.0)

Georgia

15.8

(15.1 -16.6)

Oklahoma

15.9

(14.9 -16.8)

Hawaii

16.5

(14.7 -18.4)

Oregon

16.0

(14.8 -17.2)

Idaho

16.7

(15.8 -17.6)

Pennsylvania

16.6

(16.2 -16.9)

Illinois

15.7

(15.4 -16.0)

Rhode Island

16.3

(15.1 -17.5)

Indiana

16.3

(15.7 -17.0)

South Carolina

16.0

(15.1 -16.8)

Iowa

16.9

(16.2 -17.7)

South Dakota

16.8

(15.5 -18.1)

Kansas

15.7

(15.0 -16.5)

Tennessee

16.9

(15.3 -18.4)

Kentucky

16.5

(15.8 -17.2)

Texas

16.1

(15.8 -16.5)

Louisiana

16.0

(15.2 -16.9)

Utah

15.6

(15.0 -16.2)

Maine

17.1

(15.5 -18.7)

Vermont

16.7

(15.1 -18.2)

Maryland

16.0

(14.9 -17.1)

Virginia

16.5

(15.4 -17.6)

Massachusetts

16.2

(15.2 -17.2)

Washington

15.8

(15.3 -16.3)

Michigan

16.6

(16.0 -17.2)

West Virginia

16.3

(15.5 -17.1)

Minnesota

15.6

(15.0 -16.2)

Wisconsin

16.6

(15.4 -17.7)

Mississippi

16.8

(16.1 -17.5)

Wyoming

15.9

(15.2 -16.6)

*Low precision; no estimate reported.

Source: SAMHSA, Office of Applied Studies, National Household Survey on Drug Abuse, 1999 CAI.

10702

Table C.6 Average Scale Scores of Marijuana Dependence Among Persons Aged 12 to 17, by State: 1999

State

Average Score

95% C.I.

State

Average Score

95% C.I.

National

0.30

(0.29 -0.32)

Missouri

0.23

(0.14 -0.32)

Alabama

0.20

(0.09 -0.30)

Montana

0.53

(0.34 -0.72)

Alaska

0.38

(0.28 -0.47)

Nebraska

0.12

(0.09 -0.16)

Arizona

0.37

(0.20 -0.54)

Nevada

0.41

(0.22 -0.60)

Arkansas

0.36

(0.20 -0.52)

New Hampshire

0.29

(0.18 -0.39)

California

0.36

(0.30 -0.42)

New Jersey

0.29

(0.19 -0.39)

Colorado

0.33

(0.21 -0.45)

New Mexico

0.51

(0.31 -0.70)

Connecticut

0.38

(0.17 -0.59)

New York

0.27

(0.19 -0.36)

Delaware

0.57

(0.39 -0.74)

North Carolina

0.32

(0.20 -0.43)

District of Columbia

0.32

(0.06 -0.58)

North Dakota

0.38

(0.20 -0.56)

Florida

0.21

(0.15 -0.28)

Ohio

0.24

(0.20 -0.29)

Georgia

0.25

(0.15 -0.34)

Oklahoma

0.23

(0.15 -0.31)

Hawaii

0.34

(0.21 -0.47)

Oregon

0.38

(0.24 -0.52)

Idaho

0.15

(0.08 -0.22)

Pennsylvania

0.26

(0.18 -0.34)

Illinois

0.32

(0.25 -0.39)

Rhode Island

0.36

(0.21 -0.51)

Indiana

0.24

(0.13 -0.35)

South Carolina

0.30

(0.16 -0.44)

Iowa

0.27

(0.10 -0.43)

South Dakota

0.28

(0.15 -0.41)

Kansas

0.24

(0.06 -0.41)

Tennessee

0.21

(0.12 -0.30)

Kentucky

0.29

(0.14 -0.43)

Texas

0.27

(0.22 -0.33)

Louisiana

0.35

(0.21 -0.50)

Utah

0.23

(0.15 -0.30)

Maine

0.29

(0.20 -0.38)

Vermont

0.46

(0.29 -0.63)

Maryland

0.32

(0.22 -0.42)

Virginia

0.24

(0.17 -0.31)

Massachusetts

0.50

(0.35 -0.65)

Washington

0.36

(0.21 -0.50)

Michigan

0.33

(0.26 -0.39)

West Virginia

0.34

(0.15 -0.53)

Minnesota

0.34

(0.15 -0.54)

Wisconsin

0.36

(0.24 -0.47)

Mississippi

0.33

(0.21 -0.44)

Wyoming

0.31

(0.17 -0.45)

*Low precision; no estimate reported.

NOTE: A respondent who answered "Yes" to three or more of the seven marijuana criteria for dependence listed in the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV) would be considered marijuana dependent. Respondents were assigned a score of 1 if they answered "no" to all seven questions, and a score of 8 if they answered "yes" to all the questions. A respondent who has not used marijuana in the past year was assigned a score of zero.

Source: SAMHSA, Office of Applied Studies, National Household Survey on Drug Abuse, 1999 CAI.

10530

Table C.7 Average Scale Scores of Difficulty Obtaining Marijuana Among Persons Aged 12 to 17, by State: 1999

State

Average Score

95% C.I.

State

Average Score

95% C.I.

National

3.41

(3.39 -3.44)

Missouri

3.49

(3.29 -3.68)

Alabama

3.33

(2.98 -3.68)

Montana

3.47

(3.25 -3.68)

Alaska

3.49

(3.30 -3.67)

Nebraska

3.17

(2.93 -3.40)

Arizona

3.49

(3.25 -3.72)

Nevada

3.67

(3.52 -3.82)

Arkansas

3.45

(3.28 -3.61)

New Hampshire

3.48

(3.23 -3.74)

California

3.34

(3.27 -3.41)

New Jersey

3.34

(3.21 -3.48)

Colorado

3.70

(3.53 -3.87)

New Mexico

3.59

(3.37 -3.81)

Connecticut

3.60

(3.45 -3.75)

New York

3.45

(3.31 -3.59)

Delaware

3.70

(3.45 -3.95)

North Carolina

3.28

(3.08 -3.47)

District of Columbia

3.18

(2.85 -3.50)

North Dakota

3.24

(3.01 -3.47)

Florida

3.21

(3.12 -3.31)

Ohio

3.46

(3.35 -3.57)

Georgia

3.42

(3.24 -3.60)

Oklahoma

3.35

(3.01 -3.69)

Hawaii

3.27

(3.12 -3.42)

Oregon

3.43

(3.15 -3.70)

Idaho

3.34

(3.18 -3.50)

Pennsylvania

3.39

(3.28 -3.49)

Illinois

3.57

(3.47 -3.68)

Rhode Island

3.42

(3.12 -3.72)

Indiana

3.59

(3.44 -3.73)

South Carolina

3.43

(3.28 -3.59)

Iowa

3.38

(3.24 -3.52)

South Dakota

3.09

(2.88 -3.31)

Kansas

3.29

(3.13 -3.46)

Tennessee

3.34

(3.07 -3.62)

Kentucky

3.65

(3.48 -3.81)

Texas

3.30

(3.20 -3.40)

Louisiana

3.44

(3.28 -3.61)

Utah

3.17

(3.00 -3.35)

Maine

3.41

(3.17 -3.64)

Vermont

3.54

(3.37 -3.70)

Maryland

3.55

(3.35 -3.75)

Virginia

3.36

(3.21 -3.52)