TAPS calculated weights to make survey results generalizable to the U.S. population of English-speaking adults. Investigators received these weights as variables in delivered data files.

Adjustments were made to compensate for (a) selection probabilities altered by the stratified sample design and (b) within household selection probabilities associated with the random choice of a panel member from among all eligible adults residing in the household. These adjustments constituted the base weight that corrected the sample to approximate a simple random sample of the population of adults.

The following weight, *w*1* _{i|k}*, for mailing addresses

*i*within stratum

*k*is calculated as follows:

*w*1* _{i|k}* = (

*P*) (

_{i|k }/ P_{tot}*S*)

_{tot }/ S_{i|k}where

*P _{i|k}*is the population or frame count within stratum

*k,*

*P _{tot}* is the total population count from the frame,

*S _{i|k}* is the sample count within stratum

*k,*and

*S _{tot }* is the total recruited sample size.

We also adjusted for the selection probability of the randomly selected adult within households. To adjust for this, we weighted each selected respondent, *r*, by the inverse of the number of eligible adults, *A*, ages 18 and older, enumerated as residing in household, *h, *and called this* w*2* _{r|h }*and calculated as follows:

*w*2* _{r|h }= A_{h} / *1

The base weight was the product of *w*1* _{i|k }*and

*w*2

*.[1]*

_{r|h}

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[1] An additional adjustment was made for our follow-up efforts to recruit panelists by telephone after an initial nonresponse. Households recruited based on the telephone follow-up may have over-represented addresses in the sample with a successful telephone match. Based on the natural match rate in the sample, recruited households from the telephone recruitment was weighted downward appropriately.