Table 1.

Comparisons of Design-Based 95% Confidence Intervals for Selected Parameters using Alternative Design Effect Adjustments (Source: MTF 2007-2009).

		95% Confidence Interva s:
Parameter	Weighted Estimate	Without Adjustment for Stratification and Clustering	With “Double Adjustment” for Weighting	With Correct Adjustment
Proportion: Nasal Administration	0.3627	(0.3124, 0.4130)	(0.2915, 0.4339)	(0.3015, 0.4239)
AOR: NMPM vs. MPNM	6.0120	(2.1230, 17.0245)**	(1.3798, 26.1973)*	(1.8067, 20.0071)**
AOR: NMO vs. MPNM	7.6826	(2.7874, 21.1746)***	(1.8320, 32.2206)**	(2.3923, 24.6734)***

NOTES: AOR = Adjusted Odds Ratio. NMPM = Nonmedical Use Prior to Medical Use. MPNM = Medical Use Prior to Nonmedical Use. NMO = Nonmedical Use Only. t-test of null hypothesis that regression parameter is equal to 0:

^***p < 0.001

^**p < 0.01

^*p < 0.05.