Editing DevCon (section)

=Drinks per Week=

==CADD==

Waves 1-3 of CTS and LTS were used to create drinks per week measures. There is a computed variable for Waves 1 and 2 and a measured variable for Waves 2 and 3:

'''Computed Variable:''' 

Questions from the CIDI-SAM supplement and the Monitoring the Future (MTF) Questionnaire were used to compute a drinks per week variable for Waves 1 and 2. Individuals who indicated never drinking were set to missing. Individuals who indicated drinking but not in the last 180 days were set to 0.

*<u>Question SAMX2F (supplement):</u> How many days have you used alcohol in the past 6 months (180 days)? # Days

*<u> Question MTF7 (MTF):</u> When you drink, how many drinks do you usually have at a single occasion?
** 1
** 2
** 3-4
** 5-10
** 10 or more

'''Recoding and Transforming:'''

Question MTF7 was recoded from ordinal to numeric variable of drinks at a typical occasion using the following conversions.
** 1 -> 1
** 2 -> 2
** 3-4 -> 3.5
** 5-10 -> 7.5
** 10+ -> 10

'''Combining variables:'''

Divided # of days drunk in last 180 by 26 to get days drunk in typical week, then multiplied by recoded # of drinks at typical occasion to get typical drinks per week.


After data cleaning, the distribution of the computed variable looked like this:


[[File:CTS12DPW.jpeg|frameless|border|Caption can go here]]
[[File:LTS12DPW.jpeg|frameless|border|Caption can go here]]


Change over time to DPW:

[[File:CTS DPW12 Spaghetti.jpeg|frameless|border|CTS 1-2 DPW]]
[[File:LTS DPW12 Spaghetti.jpeg|frameless|border|Caption can go here]]


'''Measured Variable:'''

Waves 2 and 3 were directly asked in the CIDI-SAM about their drinks per week. Only individuals who indicated drinking at least one drink (at least one of: can or bottle of beer, glass of wine or wine cooler, shot of hard liquor, or mixed drink with liquor) in the last 12 months were asked these questions. Individuals who did not indicate drinking at least one drink in the past month were set to missing.

'''Questions:'''

* <u>SAM C2TOT4</u>: Total number of drinks in the last week: # drinks

* <u> SAM C3TOT4</u>: Total number of drinks in a typical week, if different from the last week: # drinks

'''Combining variables:'''

Used # from C3TOT4 if available, otherwise used # from C2TOT4.


After data cleaning, the distribution of the measured variable looked like this:


[[File:CTS23DPW.jpeg|frameless|border|Caption can go here]]
[[File:LTS23DPW.jpeg|frameless|border|Caption can go here]]


Change over time to DPW:


[[File:CTS DPW23 Spaghetti.jpeg|frameless|border|CTS DPW]]
[[File:LTS DPW23 Spaghetti.jpeg|frameless|border|Caption can go here]]


To examine the correlation between computed and measured DPW variables over the waves, measures were left-anchored by adding a constant of 1 to all measures, then log-transformed, controlling for sex.

'''CTS Variables'''

[[File:Sexvardpw.jpeg|frameless|border|CTS DPW]]
{| class="wikitable"
|+Sex-Controlled CTS Drinks Per Week Variable Correlations (Log-Transformed)
|-
! !! Wave 1 Computed !! Wave 2 Computed !! Wave 2 Measured !! Wave 3 Measured
|-
| Wave 1 Computed || 1 || ||  || 
|-
| Wave 2 Computed || .15 || 1 ||  ||  
|-
| Wave 2 Measured || .15 || .63 || 1 || 
|-
| Wave 3 Measured  || .05 || .39 || .3 || 1
|-
|}

'''LTS Variables'''

[[File:SexvarLTSDPW.jpeg|frameless|border|LTS DPW]]
{| class="wikitable"
|+Sex-Controlled LTS Drinks Per Week Variable Correlations (Log-Transformed)
|-
! !! Wave 1 Computed !! Wave 2 Computed !! Wave 2 Measured !! Wave 3 Measured
|-
| Wave 1 Computed || 1 || ||  || 
|-
| Wave 2 Computed || -.16 || 1 ||  ||  
|-
| Wave 2 Measured || -.4 || .58 || 1 || 
|-
| Wave 3 Measured  || -.44 || .21 || .26 || 1
|-
|}

==FTP==
There is no measure of drinking quantity available (beyond binge drinking measures). Frequency measures are available in the G2 generation.

'''Questions:'''

*<u>Question XalcMo</u>: For wave X, past month frequency of alcohol use (targets and target sibs ONLY):
** 0 = Never
** 1 = Less than once a week
** 2 = 1-2 times a week
** 3 = 3-4 times a week
** 4 = 5-6 times a week
** 5 = Every day

The change over time in frequency by age looks like this (added jitter):


[[File:FTP AlcFreq.jpeg|frameless|border|Caption can go here]]

* *0 = Never, 1 = <1/week, 2 = 1-2/week, 3 = 3-4/week, 4 = 5-6/week, 5 = everyday

==AddHealth==

'''Questions'''

Wave 1:

*<u>Question H1TO15</u>: During the past 12 months, on how many days did you drink alcohol?
** 1 = Every day or almost every day
** 2 = 3-5 days a week
** 3 = 1-2 days a week
** 4 = 2-3 days a month
** 5 = Once a month or less (3-12 times in the past 12 months)
** 6 = 1 or 2 days in the past 12 months
** 7 = Never
** Options for refused, legitimate skip, don't know
** Only asked if ever had a drink more than 2 or 3 times (not just a sip or taste of someone else's drink)

<u>Question H1TO16</u>: Think of all the times you have had a drink during the past 12 months. How many drinks did you usually have each time?
** Answers range from 1-90 drinks
** Not asked if H1TO15=7, refused, don't know


Wave 2: 

*<u>Question H2TO19</u>: During the past 12 months, on how many days did you drink alcohol?
** 1 = Every day or almost every day
** 2 = 3-5 days a week
** 3 = 1-2 days a week
** 4 = 2-3 days a month
** 5 = Once a month or less (3-12 times in the past 12 months)
** 6 = 1 or 2 days in the past 12 months
** 7 = Never
** Options for refused, legitimate skip, don't know
** Only asked if ever had a drink more than 2 or 3 times since month of last interview (not just a sip or taste of someone else's drink)

*<u>Question H2TO20</u>: Think of all the times you have had a drink during the past 12 months. How many drinks did you usually have each time?
** Answers range from 1-95 drinks
** Not asked if H2TO19 = 7, refused, don't know

Wave 3: 

*<u>Question H3TO38:</u> During the past 12 months, on how many days did you drink alcohol? ''Note: This will need to be recoded to match W1/2''
** 0 = None
** 1 = 1 or 2 days in the past 12 months
** 2 = Once a month or less (3-12 times in the past 12 months)
** 3 = 2-3 days a month
** 4 = 1-2 days a week
** 5 = 3-5 days a week
** 6 = Every day or almost every day
** Options for refused, don't know, legitimate skip, not applicable, missing
** Only asked if, since June 1995, subject ever had a drink of beer, wine, or liquor more than 2 or 3 times (does not include sips or tastes from someone else's drink)

*<u>Question H3TO39</u>: Think of all the times you have had a drink during the past 12 months. How many drinks did you usually have each time?
** Answers range from 1-18 drinks; options for refused, legitimate skip, don't know, not applicable, missing
** Not asked if H3TO38 = 0

Wave 4: 

*<u>Question H4TO35</u>: During the past 12 months, on how many days did you drink alcohol? ''Note: This will need to be recoded to match W1/2''
** 0 = None
** 1 = 1 or 2 days in the past 12 months
** 2 = Once a month or less (3-12 times in the past 12 months)
** 3 = 2-3 days a month
** 4 = 1-2 days a week
** 5 = 3-5 days a week
** 6 = Every day or almost every day
** Options for refused, don't know, legitimate skip, not applicable, missing
** Only asked if ever had a drink more than 2 or 3 times (not just a sip or taste of someone else's drink)

*<u>Question H4TO36</u>: Think of all the times you have had a drink during the past 12 months. How many drinks did you usually have each time?
** Answers range from 1-18; options for refuse, legitimate skip, don't know
** Not asked if H4TO35 = 0

'''Recoding and Transforming'''

Questions H1TO15 and H2TO19 were recoded from ordinal to numeric using the following conversions:
** 1 -> 365
** 2 -> 208
** 3 -> 78
** 4 -> 30
** 5 -> 7.5 
** 6 -> 1.5 
** 7 -> 0
** Others -> NA

Questions H3TO38 and H4TO35 were recoded from ordinal to numeric using the following conversions:
** 0 -> 0
** 6 -> 365
** 5 -> 208
** 4 -> 78
** 3 -> 30
** 2 -> 7.5 
** 1 -> 1.5
** Others -> NA

'''Combining variables:'''

The transformed drinking days per year variables were multiplied by the drinks per day variables, then divided by 52 to get an average drinks per week over the last year:
** DPW1 = (Recoded H1TO15 * H1TO16)/52
** DPW2 = (Recoded H2TO19 * H2TO20)/52
** DPW3 = (Recoded H3TO38 * H3TO39)/52
** DPW4 = (Recoded H4TO35 * H4TO36)/52

After data cleaning, the distributions of the DPW variables looked like this:

[[File:AddHealthDPW.jpg|frameless|border|Caption can go here]]


The change over time to average DPW (added jitter) looked like this:

[[File:AddHealthDPWSpaghetti.jpg|frameless|border|Caption can go here]]

==MLS==
Subjects were assessed over time with different measures in two groups; A1-7 and A18-26. Drinking quantity was asked at both time points. with the variable CIG3

'''Questions'''
A1-A7:

*<u>Question DAYPERMO</u>: Days per month drinking in last 6 months

*<u>Question DRINKDAY</u>: Drinks per day in last 6 months

A18-26:

*<u>Question DOA1</u>: Days per month drinking in last 6 months

*<u>Question DOA2</u>: Drinks per day in last 6 months


'''Combining Variables'''
Drinks Per Week variables were created by multiplying days drunk in last 6 months by drinks per day in last 6 months, then dividing by 4:

** DPWA1-A7= (DAYPERMO*DRINKDAY)/4
** DPWA18-26 = (DOA1*DOA2)/4


The distribution of cigarettes per day over test time (Test variable, X axis), which roughly corresponds as 1-7 = 11-17 years, and 18-26 as 18-26 years old (see Descriptives), looked like this (added jitter):

[[File:MLSDPW.jpeg|frameless|border|Caption can go here]]

==MTFS==