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--- keller_and_evans_lab:dev_con [2016/10/05 20:13]
maia_frieser /* AddHealth */
+++ 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 70: / Line 70: @@
 ** 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)| .83 (3.02) |
+| 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)| .98 (3.46) |
+| 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)*| .91 (1.73) |
+| 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)| .81 (1.55) |
+| 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 184: / Line 185: @@
     *  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
     *  Not asked if to H1TO5 = 0
@@ Line 224: / Line 225: @@
     *  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_add_health_cpd.jpg}}
+The change in CPD over time (added jitter) looks like this:
+{{file_add_health_cpdspaghetti.jpg}}
@@ Line 481: / Line 497: @@
 **Combining variables:**
-The transformed drinking days per year variables were multiplied by the drinks per day variables, then divided by 365 to get an average drinks per day over the last year:
+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)/365
+  *     *  DPW1 = (Recoded H1TO15 * H1TO16)/52
-    *  DPW2 = (Recoded H2TO19 * H2TO20)/365
+    *  DPW2 = (Recoded H2TO19 * H2TO20)/52
-    *  DPW3 = (Recoded H3TO38 * H3TO39)/365
+    *  DPW3 = (Recoded H3TO38 * H3TO39)/52
-    *  DPW4 = (Recoded H4TO35 * H4TO36)/365
+    *  DPW4 = (Recoded H4TO35 * H4TO36)/52
-The distributions of the DPW variables looked like this:
+After data cleaning, the distributions of the DPW variables looked like this:
-[[File:AddHealthDPW.jpeg|frameless|border|AddHealth DPW]
+{{file_add_health_dpw.jpg}}
+The change over time to average DPW (added jitter) looked like this:
+{{file_add_health_dpwspaghetti.jpg}}
 ====== 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 ======

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