TABLE 1


Adult Adolescent1 College Treatment/Prison
Level 3 Lifetime1.92
(1.52-2.33)
3.38
(1.79-4.98)
5.56
(3.54-7.59)
15.44
(11.58-19.31)
Level 2 Lifetime4.15
(3.11-5.18)
8.40
(5.61-11.18)
10.88
(4.86-16.89)
17.29
(11.05-23.53)
Level 1 Lifetime93.92
(92.79 - 95.06)
90.38
(86.49-94.29)
83.13
(74.71-91.55)
67.61
(58.10-77.11)
Level 3 Past year1.46
(0.92-2.01)
4.80
(3.21-6.40)
Level 2 Past Year2.54
(1.72-3.37)
14.60
(8.32-20.89)
Level 1 Past Year96.04
(94.82-97.25)
82.68
(76.12-89.17)

1Although mean past-year estimates are higher than mean lifetime estimates for adolescents, there is considerable overlap between the confidence intervals of these measures; adolescents' past-year gambling experiences are likely to be comparable to their lifetime gambling experiences. Differences between instruments that provide past-year estimates among adolescents and instruments that provide lifetime estimates among adolescents most likely account for these discrepancies.

















TABLE 2


Estimate Time Frame & Statistic Adult Adolescent College Treatment or Prison
Level 3 LifetimeMean1.92  3.38  5.5615.44
Median1.80  3.00  5.0014.29
5% Trimmed Mean1.78  3.33  5.1415.07
Andrews' Wave M-Estimator1.73  2.74  4.6413.49
Level 2 LifetimeMean4.15  8.4010.8817.29
Median3.50  8.45  6.5015.64
5% Trimmed Mean3.76  8.35  9.8317.01
Andrews' Wave M-Estimator3.31  8.22  6.5116.59
Level 3 Past Year  Mean1.46  4.80
Median1.20  4.37
5% Trimmed Mean1.27  4.77
Andrews' Wave M-Estimator1.10  4.65
Level 2 Past Year  Mean2.5414.60
Median2.2011.21
5% Trimmed Mean2.2513.83
Andrews' Wave M-Estimator2.1511.26