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Questionnaire Dwelling Unit-Level and Person Pair-Level Sampling ...

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Table L.1 2006 NSDUH Selected <strong>Pair</strong>-<strong>Level</strong> Weight Summary Statistics (continued)<br />

SDU-<strong>Level</strong> Weights 1<br />

(SDUWT: YR06WT1*...*YR06WT9)<br />

Before sel.pr.ps 1<br />

(SDUWT*PR06WT10)<br />

After sel.pr.ps 1<br />

(SDUWT*PR06WT10*PR06WT11)<br />

Domain n Min Q1 2 Med Q3 2 Max UWE 3 Min Q1 2 Med Q3 2 Max UWE 3 Min Q1 2 Med Q3 2 Max UWE 3<br />

Population Density<br />

Large MSA 1 11,646 34 648 936 1,413 7,441 1.32 42 1,587 4,055 9,989 2,481,678 12.72 15 1,617 4,090 10,127 792,439 7.21<br />

Medium to Small 12,853 20 329 623 988 6,067 1.51 27 893 2,204 6,045 3,069,164 35.10 13 789 2,148 5,616 1,453,190 20.75<br />

MSA 1<br />

Non-MSA, 1 Urban 764 20 292 612 916 2,597 1.50 27 890 2,283 6,197 119,505 3.98 18 798 2,247 6,294 107,495 4.07<br />

Non-MSA, 1 Rural 1,514 23 212 564 879 4,409 1.66 34 821 2,003 5,669 79,681 3.66 22 791 2,195 5,923 236,371 5.51<br />

Group Quarters<br />

Group 478 26 314 738 1,226 3,250 1.51 44 590 1,170 1,918 126,968 13.59 53 429 1,176 2,664 18,004 2.66<br />

Nongroup 26,299 20 483 733 1,204 7,441 1.45 27 1,128 2,912 7,839 3,069,164 20.31 13 1,078 2,937 7,523 1,453,190 11.66<br />

1 This step used demographic variables from screener data for all selected person pairs; DU = dwelling unit, MSA = metropolitan statistical area, PR = pair, PS = poststratification, SDU = screener dwelling unit,<br />

Sel = selected.<br />

2 Q1 <strong>and</strong> Q3 refer to the first <strong>and</strong> third quartile of the weight distribution.<br />

3 Unequal weighting effect (UWE) is defined as 1 + [(n - 1)/n]*CV 2 , where CV = coefficient of variation of weights.<br />

L-5

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