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Table 6.11 2003 NSDUH CAI Audit Trail Timing Data: Hallucinogens Section
Age Category 12-17 18 +
Year of Interest 2001 2002 2003 2001 2002 2003
Sample Size 7,559 22,813 21,836 15,194 42,755 43,411
Summary Statistics (Minutes)
Mean (F) 0.9 1.0 1.0 0.9 0.9 1.0
Variance (σ 2 ) 0.5 0.6 0.5 0.7 0.9 375.4
Standard Deviation (σ) 0.7 0.8 0.7 0.8 0.9 19.4
Quartiles
Maximum 12.1 25.3 26.9 28.1 59.2 4,034.1
Q3 1.2 1.3 1.3 1.1 1.2 1.2
Median 0.8 0.8 0.8 0.6 0.7 0.7
Q1 0.5 0.5 0.5 0.4 0.4 0.4
Minimum 0.0 0.0 0.0 0.0 0.0 0.0
Range 12.1 25.3 26.9 28.1 59.2 4,034.1
Mode 0.4 0.5 0.6 0.4 0.4 0.4
Percentiles
Extremes
99% 3.4 3.6 3.2 3.7 3.7 3.6
95% 2.1 2.2 2.1 2.3 2.4 2.3
90% 1.8 1.8 1.8 1.8 1.9 1.9
10% 0.3 0.3 0.3 0.3 0.3 0.3
5% 0.2 0.3 0.3 0.2 0.2 0.2
1% 0.2 0.2 0.2 0.1 0.2 0.2
5 Highest Values (Highest) 12.1 25.3 26.9 28.1 59.2 4,034.1
9.4 17.5 12.2 15.8 44.7 22.6
8.5 16.9 11.5 12.0 37.7 21.9
7.7 13.1 11.0 11.9 36.3 20.8
7.5 12.5 8.6 10.7 35.2 19.3
5 Lowest Values 0.0 0.0 0.0 0.0 0.0 0.0
0.0 0.0 0.0 0.0 0.0 0.0
0.0 0.0 0.0 0.0 0.0 0.0
0.0 0.0 0.0 0.0 0.0 0.0
(Lowest) 0.0 0.0 0.0 0.0 0.0 0.0
Note: Time recording in 2003 begins at HALINTRO and stops recording after LSCC98 in the Hallucinogens
Module. Time recording in 2001 and 2002 began at HALINTRO and stopped recording after LSCC55 in the
Hallucinogens Module.
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