The content of questionnaires included data about family income, maternal age at child birth, education level, illness previous history to conception, medication use, occupation, personal habits, and the child's birth characteristics.
Subjects with vs. without RRSB did not differ in terms of sex ratio, age, education, occupation, predisposing habits, duration of cocaine use, hours of sleep, comorbid psychiatric disorders, and concomitant use of other drugs.
Each person was interviewed about their age, height, weight, education, occupation, smoking habits (smoking of cigarettes and/or use of smokeless tobacco), amount of cigarettes smoked/day, fatigue, and general respiratory health status, where asthma was defined by a positive response to "Did any doctor diagnose you with asthma?".
Secondly, model 3 is, like many approaches trying to disentangle direct and indirect 'effects', at risk of endogenous selection bias (Elwert and Winship 2013): rather than conceptualizing occupation, reading habits and adult learning as a mediator between formal education and skills, they could also be regarded as common outcomes (descendants) of education and skills.
Information regarding the patients name, age, sex, occupation, personal habits and present complaints was gathered.
Questions included demographic details, occupation, lifestyle habits, including smoking, and health [ 20].
Factors considered were age, sex, susceptibility to sunburn, complexion, eye colour, ancestry, occupation, clothing habits and residential district.
Each geographical subdivision has different characteristics in altitude, occupation, dietary habits and socioeconomic conditions as well as separate administrative blocks (table 1).
†Even though we evaluated several paternal factors in relation to breastfeeding exclusivity (e.g., paternal marital status, occupation, smoking habits, etc).
The parents of each index child were interviewed with respect to events during the relevant pregnancy, occupation, smoking habits, and past medical history of themselves, the child's siblings and other relatives.
