Editing DevCon (section)

=Cigarettes per Day=
==CADD==
In CADD sufficient information to calculate CPD was present only at Waves 2 and 3 in LTS and CTS. We used the following questions from the CIDI-SAM (only asked to participants who smoked at least 20 cigarettes in lifetime AND smoked in the past 12 months):

'''Questions'''
*<u>Question B1B</u>: How would you describe your usual pattern of cigarette smoking in the past 12 months? Would you describe it as...
** Every day?
** 5 or 6 days a week?
** 3 or 4 days a week?
** 1 or 2 days a week?
** 1 to 3 days a month
** Less than once a month?

* <u>Question B1C</u>: In the past 12 months when you were smoking cigarettes (FREQUENCY IN B1B), how many would you usually smoke in a day? IF MORE THAN 95, CODE 96: ______ (# Cigarettes)

'''Recoding and Transforming'''

Question B1B was recoded from ordinal to numeric variable of days smoked in 365 days using the following conversions.
* Every day -> 365 days
* 5 or 6 days a week -> 286 days/year (5.5 days/week * 52 weeks/year)
* 3-4 days a week -> 182 days/year (3.5 days/week * 52 weeks/year)
* 1-2 days a week -> 78 days/year (1.5 days/week * 52 weeks/year)
* 1-3 days a month -> 24 days/year (.46 days/week * 52 weeks / year)
* Less than once a month -> NA

'''Combining Variables'''

The recoded question B1B was then multiplied by B1C, and divided result by 365 to get average cigarettes per day over the last 12 months.


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


[[File:CTS CPD.jpeg|frameless|border|Caption can go here]]
[[File:LTSCPD.jpeg|frameless|border|Caption can go here]]


Changes over time to average CPD:


[[File:CTS CPD Spaghetti.jpeg|frameless|border|CTS]]
[[File:LTS CPD Spaghetti.jpeg|frameless|border|LTS]]

To examine the correlation between computed CPD variables over the waves, measures were log-transformed, controlling for sex.

'''CTS Variables'''

[[File:Cpdctssex.jpeg|frameless|border|CTS CPD]]
{| class="wikitable"
|+Sex-Controlled CTS Cigs Per Day Variable Correlations (Log-Transformed)
|-
! !! Wave 1 Computed !! Wave 2 Computed
|-
| Wave 1 Computed || 1 ||
|-
| Wave 2 Computed || .66 || 1 
|-
|}


'''LTS Variables'''

[[File:Cpdltssexvar.jpeg|frameless|border|LTS CPD]]
{| class="wikitable"
|+Sex-Controlled LTS Cigs Per Day Variable Correlations (Log-Transformed)
|-
! !! Wave 1 Computed !! Wave 2 Computed
|-
| Wave 1 Computed || 1 ||
|-
| Wave 2 Computed || .2 || 1 
|-
|}

==FTP==

CPD is only available for parents of target individuals (G1 generation). Measures of alcohol/tobacco use frequency only are available for the G2 generation. 

'''Questions'''

*<u>Question XtobMo</u>: For wave X, past month frequency of tobacco 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

*<u>Question Xtob</u>: For wave X, current tobacco use (parents of targets ONLY):
** 1 = Yes
** 2 = No

* <u>Question Xcig</u>: For wave X, current cigarettes per day (parents of targets ONLY): # Cigarettes


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


[[File:FTP TobFreq.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 H1TO5</u>: During the past 30 days, on how many days did you smoke cigarettes? 
** Answers range from 0-30 days; options for refused, don't know, legitimate skip
** Asked of everyone who has ever tried cigarette smoking (even just 1 or 2 puffs), regardless of smoking regularity

*<u>Question H1TO7</u>: During the past 30 days, on the days you smoked, how many cigarettes did you smoke each day?
** Answers range from 0-95 cigarettes; options for refused, don't know, legitimate skip
** Not asked if to H1TO5 = 0

Wave 2:

*<u>Question H2TO5</u>: During the past 30 days, on how many days did you smoke cigarettes?
** Answers range from 0-30 days; options for refused, don't know, legitimate skip
** Asked of everyone who has ever tried cigarette smoking since the month of last interview (even just 1 or 2 puffs), regardless of smoking regularity

*<u>Question H2TO7</u>: During the past 30 days, on the days you smoked, how many cigarettes did you smoke each day?
** Answers range from 0-95 cigarettes; options for refused, don't know, legitimate skip
** Asked even if response to H2TO5=0

Wave 3: 

*<u>Question H3TO6</u>: Have you ever smoked at all in the past 30 days?
** 0 = no
** 1 = yes
** Options for refused, don't know, legitimate skip, missing
** Only asked of current, regular (smoked at least one cigarette a day for the last 30 days) smokers; not asked of current smokers who do not smoke daily.

*<u>Question H3TO7</u>: During the past 30 days, on how many did you smoke cigarettes?
** Answers range from 0-30 days; options for refused, don't know, legitimate skip, missing
** Only asked if answer to H3TO6 != 0
** Only asked of current, regular (smoked at least one cigarette a day for the last 30 days) smokers; not asked of current smokers who do not smoke daily.

*<u>Question H3TO10</u>: During the past 30 days, on the days you smoked, how many cigarettes did you smoke each day?
** Answers range from 1-100 cigarettes; options for refused, legitimate skip, don't know, not applicable, missing
** Only asked if answer to H3TO6 != 0
** Only asked of current, regular (smoked at least one cigarette a day for the last 30 days) smokers; not asked of current smokers who do not smoke daily.


Wave 4: 

*<u>Question H4TO5</u>: During the past 30 days, on how many days did you smoke cigarettes?
** Answers range from 0-30 days; options for refused, don't know

*<u>Question H4TO6</u>: During the past 30 days, on the days you smoked, how many cigarettes did you smoke each day?
** Answers range from 1-100 cigarettes; options for refuse, legitimate skip, don't know
** Not asked if H4TO5 = 0, refused, or don't know

'''Combining Variables'''
The smoking days per month variables were combined with the cigarettes per day variables, then divided by 30 to get a measure of average cigarettes per day over the last month:
** CPD1 = (H1TO5*H1TO7)/30
** CPD2 = (H2TO5*H2TO7)/30
** CPD3 = (H3TO07*H3TO10)/30
** CPD4 = (H4TO5*H4TO6)/30

The distribution of the CPD variables looked like this:

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


The change in CPD over time (added jitter) looks like this:

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

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

'''Questions'''
*<u>Question CIG3</u>: Cigarettes in past 30 days
** 0 = not at all
** 1 = less than one cigarette per day
** 2 = one to five cigarettes per day
** 3 = about one-half pack per day
** 4 = about one pack per day
** 5 = about one and one-half packs per day
** 6 = two packs or more per day
** 8 = NA (No smoking in lifetime OR no smoking in last 12 months)
** 9 = missing

'''Recoding and Transforming'''

Question CIG3 was recoded from ordinal to numeric using the following conversions (assuming 20 cigarettes/pack).
* 0 = 0
* 1 = .5 *
* 2 = 3.5
* 3 = 10
* 4 = 20
* 5 = 30
* 6 = 40
* 8 = NA
* 9 = NA
* * Subjects who indicated smoking less than one cigarette per day were set at .5 to differentiate them from non-smokers. Because they do not indicate smoking a whole cigarette, they were not set at 1.

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:MLSCPD.jpeg|frameless|border|MLS]]

==MTFS==