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| smoking_derivatives [2020/10/14 09:52] – [Table] trynke | smoking_derivatives [2025/02/05 13:49] (current) – external edit 127.0.0.1 |
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| Using the raw self-reported data from [[1A questionnaire 1]], researchers from the [[https://www.rug.nl/research/epidemiology/vonk|UMCG Department of Epidemiology]] calculated various derivative variables for smoking behavior ([[sections]]: [[lifestyle & environment]] and [[secondary & linked variables]]).\\ | Using the raw self-reported data from [[1A questionnaire 1]], researchers from the [[https://www.rug.nl/research/epidemiology/vonk|UMCG Department of Epidemiology]] calculated various derivative variables for smoking behavior ([[sections]]: [[lifestyle & environment]] and [[secondary & linked variables]]).\\ |
| These derivative variables can be requested from Lifelines (data@lifelines.nl) or requested in the Lifelines catalogue.\\ | These derivative variables can be requested from Lifelines (data@lifelines.nl) or requested in the Lifelines catalogue.\\ |
| | **Please note:** An updated version of the smoking derivatives is available which includes derivatives for more time points and an updated version for the baseline derivaties (see [[smoking_derivatives_v2|updated smoking derivatives]]). \\ |
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| The following derivative variables were calculated for ~152,300 adult participants at [[1A|baseline]]: | The following derivative variables were calculated for ~152,300 adult participants at [[1A|baseline]]: |
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| **Derivative variables** | **Derivative variables** |
| ^ Variable name ^ Variable label ^ Additional information ^ | | **Code** ^ Variable name ^ Variable label ^ Additional information ^ |
| | py | packyears | cumulative smoking history: 1 packyear = 20 cigarettes per day for 1 year (or 10 cigarettes for 2 years, or 1 cigarette for 20 years). Cigars are regarded as 3 cigarettes. | | | packyears_calculable_adu_c_1 | pyok | pack years can be calculated | - | |
| | pywocig | packyears without cigars | Since cigars may add very much to the number of packyears, the total number of packyears without cigars is also calculated. | | | packyears_cumulative_adu_c_1 | py | packyears | cumulative smoking history: 1 packyear = 20 cigarettes per day for 1 year (or 10 cigarettes for 2 years, or 1 cigarette for 20 years). Cigars are regarded as 3 cigarettes. | |
| | smokduration | duration of smoking in years | Total number of years smoking. | | | packyears_nocigars_adu_c_1 | pywocig | packyears without cigars | Since cigars may add very much to the number of packyears, the total number of packyears without cigars is also calculated. | |
| | smoking | smoking | Categorical variable with three categories: 0=never smoker, 1=ex smoker, 2=current smoker | | | smoking_calculable_adu_c_1 | smokdurok | smoking duration can be calculated | - | |
| | smkstart | age at start of smoking | - | | | smoking_duration_adu_c_1 | smokduration | duration of smoking in years | Total number of years smoking. | |
| | smkstop | age at end of smoking | - | | | smoking_habit_adu_c_1 | smoking | smoking | Categorical variable with three categories: 0=never smoker, 1=ex smoker, 2=current smoker | |
| | currsmoker | current smoker | 0=no, 1=yes | | | smoking_startage_adu_c_1 | smkstart | age at start of smoking | - | |
| | eversmoker | ever smoker | 0=no, 1=yes. Both current and ex smokers are regarded as ever smokers. | | | smoking_endage_adu_c_1 | smkstop | age at end of smoking | - | |
| | exsmoker | ex smoker | 0=no, 1=yes | | | current_smoker_adu_c_1 | currsmoker | current smoker | 0=no, 1=yes | |
| | currentcigarettes | current number of cigarettes per day | - | | | ever_smoker_adu_c_1 | eversmoker | ever smoker | 0=no, 1=yes. Both current and ex smokers are regarded as ever smokers. | |
| | currentcigarillos | current number of cigarillos per day | - | | | ex_smoker_adu_c_1 | exsmoker | ex smoker | 0=no, 1=yes | |
| | currentcigars | current number of cigars | - | | | cigarettes_frequency_adu_c_1 | currentcigarettes | current number of cigarettes per day | - | |
| | currentpipe | current grams of pipe tobacco per day | - | | | cigarillos_frequency_adu_c_1 | currentcigarillos | current number of cigarillos per day | - | |
| | netgestopt | - | Variable indicating if the participant has recently quit smoking. This is the case if SMK3 is 'YES', SMK4A-D are '0' or missing, SMK5='YES' and SMK6 is equal to the current age. (1=yes) | | | cigars_frequency_adu_c_1 | currentcigars | current number of cigars | - | |
| | | pipetobacco_frequency_adu_c_1 | currentpipe | current grams of pipe tobacco per day | - | |
| | | recent_quitter_adu_c_1 | recent_quit | recent quitter | Variable indicating if the participant has recently quit smoking. This is the case if SMK3 is 'YES', SMK4A-D are '0' or missing, SMK5='YES' and SMK6 is equal to the current age. (1=yes) | |
| | | recent_starter_adu_c_1 | recent_start | recent starter | - | |
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| ===== Papers using Lifelines smoking derivative data ===== | ===== Papers using Lifelines smoking derivative data ===== |
