IBG Wiki

User Tools

Site Tools

Trace: • computing
keller_and_evans_lab:dev_con

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision 		Previous revision
Last revision Both sides next revision
keller_and_evans_lab:dev_con [2016/09/29 16:49]
maia_frieser /* Descriptives */ 		keller_and_evans_lab:dev_con [2019/10/31 10:47]
lessem ↷ Page moved from dev_con to keller_and_evans_lab:dev_con
Line 45: Line 45:
  
 ** Michigan Longitudinal Study (MLS) Targets and Siblings ** ** Michigan Longitudinal Study (MLS) Targets and Siblings **
-^ Test Wave^ Sample Size - SAM^ % Male^ Mean (SD) Age^ Mean (SD) CPD^ Mean (SD) DPW |+^ Test Wave^ Sample Size^ % Male^ Mean (SD) Age^ Mean (SD) CPD^ Mean (SD) DPW |
 | 1| 332| 67%| 11.42 (.34)| .17 (.76)| NA | | 1| 332| 67%| 11.42 (.34)| .17 (.76)| NA |
 | 2| 345| 67%| 12.44 (.36)| 2.27 (8.31)| .21 (.61) | | 2| 345| 67%| 12.44 (.36)| 2.27 (8.31)| .21 (.61) |
Line 63: Line 63:
 | 26| 142| 69%| 26.37 (.38)| 10.28 (9.37)| 6.63 (8.67) | | 26| 142| 69%| 26.37 (.38)| 10.28 (9.37)| 6.63 (8.67) |
  
 +
 +
 +====== AddHealth ======
 +
 +
 +** National Longitudinal Study of Adolescent to Adult Health (AddHealth) Descriptives **
 +^ Wave^ Sample Size^ % Male^ Mean (SD) Age^ Mean (SD) CPD^ Mean (SD) DPW |
 +| 1| 20745| 49%| 16.15 (1.74)| 5.39 (7.92)| 1.91 (7.89)** |
 +| 2| 14738| 49%| 16.81 (1.62)| 5.51 (8.01)| 2.07 (8.03)** |
 +| 3| 15197| 47%| 22.36 (1.83)| 10.34 (9.95)*| 4.5 (10.61) |
 +| 4| 15701| 47%| 29.1 (1.75)| 9.26 (9.9)| 4.02 (9.49) |
 +
 +  *  *only asked of regular smokers, not anyone who has ever tried even a puff of a cigarette
 +  *  **outliers removed
  
  
Line 92: Line 106:
   *  1-3 days a month -> 24 days/year (.46 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   *  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. 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.
Line 169: Line 185:
     *  Asked of everyone who has ever tried cigarette smoking (even just 1 or 2 puffs), regardless of smoking regularity     *  Asked of everyone who has ever tried cigarette smoking (even just 1 or 2 puffs), regardless of smoking regularity
  
-  * Question H1TO6: During the past 30 days, on the days you smoked, how many cigarettes did you smoke each day?+  * Question H1TO7: 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     *  Answers range from 0-95 cigarettes; options for refused, don't know, legitimate skip
     *  Not asked if to H1TO5 = 0     *  Not asked if to H1TO5 = 0
Line 209: Line 225:
     *  Answers range from 1-100 cigarettes; options for refuse, legitimate skip, don't know     *  Answers range from 1-100 cigarettes; options for refuse, legitimate skip, don't know
     *  Not asked if H4TO5 = 0, refused, or 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_add_health_cpd.jpg}}
 +
 +The change in CPD over time (added jitter) looks like this:
 +
 +{{file_add_health_cpdspaghetti.jpg}}
  
  
Line 241: Line 272:
   *  * 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.   *  * 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, looked like this (added jitter):+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}} {{file_mlscpd.jpeg}}
Line 441: Line 472:
     *  Answers range from 1-18; options for refuse, legitimate skip, don't know     *  Answers range from 1-18; options for refuse, legitimate skip, don't know
     *  Not asked if H4TO35 = 0     *  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_add_health_dpw.jpg}}
 +
 +The change over time to average DPW (added jitter) looked like this:
 +
 +{{file_add_health_dpwspaghetti.jpg}}
  
  
 ====== MLS ====== ====== 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:
 +
 +  * Question DAYPERMO: Days per month drinking in last 6 months
 +
 +  * Question DRINKDAY: Drinks per day in last 6 months
 +
 +A18-26:
 +
 +  * Question DOA1: Days per month drinking in last 6 months
 +
 +  * Question DOA2: 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}}
  
  
 ====== MTFS ====== ====== MTFS ======
  
keller_and_evans_lab/dev_con.txt · Last modified: 2019/10/31 10:48 by lessem

Page Tools

Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Noncommercial-Share Alike 4.0 International
CC Attribution-Noncommercial-Share Alike 4.0 International Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki