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keller_and_evans_lab:dev_con [2016/10/05 19:49] 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 |
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** National Longitudinal Study of Adolescent to Adult Health (AddHealth) Descriptives ** | ** National Longitudinal Study of Adolescent to Adult Health (AddHealth) Descriptives ** | ||
^ Wave^ Sample Size^ % Male^ Mean (SD) Age^ Mean (SD) CPD^ Mean (SD) DPW | | ^ 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)| |
- | | 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)| |
- | | 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| 15701| 47%| 29.1 (1.75)| 9.26 (9.9)| .3 (.97) | | + | | 4| 15701| 47%| 29.1 (1.75)| 9.26 (9.9)| |
* *only asked of regular smokers, not anyone who has ever tried even a puff of a cigarette | * *only asked of regular smokers, not anyone who has ever tried even a puff of a cigarette | ||
+ | * **outliers removed | ||
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* 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. | ||
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* 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 | + | * Question |
* 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 | ||
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* 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: | ||
+ | * | ||
+ | * CPD2 = (H2TO5*H2TO7)/ | ||
+ | * CPD3 = (H3TO07*H3TO10)/ | ||
+ | * CPD4 = (H4TO5*H4TO6)/ | ||
+ | |||
+ | 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}} | ||
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* 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: | ||
+ | * | ||
+ | * 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: | ||
+ | * | ||
+ | * 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: | ||
+ | * | ||
+ | * 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: | ||
+ | |||
+ | * | ||
+ | * DPWA18-26 = (DOA1*DOA2)/ | ||
+ | |||
+ | 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), | ||
+ | |||
+ | {{file_mlsdpw.jpeg}} | ||
====== MTFS ====== | ====== MTFS ====== | ||