The data come from the Australian Health Survey of 1977-78 and consist of 5190 single adults where young and old have been oversampled.
data(dvisits)A data frame with 5190 observations on the following 19 variables.
sex1 if female, 0 if male
ageAge in years divided by 100 (measured as mid-point of 10 age groups from 15-19 years to 65-69 with 70 or more coded treated as 72)
agesqage squared
incomeAnnual income in Australian dollars divided by 1000 (measured as mid-point of coded ranges Nil, less than 200, 200-1000, 1001-, 2001-, 3001-, 4001-, 5001-, 6001-, 7001-, 8001-10000, 10001-12000, 12001-14000, with 14001- treated as 15000
levyplus1 if covered by private health insurance fund for private patient in public hospital (with doctor of choice), 0 otherwise
freepoor1 if covered by government because low income, recent immigrant, unemployed, 0 otherwise
freerepa1 if covered free by government because of old-age or disability pension, or because invalid veteran or family of deceased veteran, 0 otherwise
illnessNumber of illnesses in past 2 weeks with 5 or more coded as 5
actdaysNumber of days of reduced activity in past two weeks due to illness or injury
hscoreGeneral health questionnaire score using Goldberg's method. High score indicates bad health
chcond11 if chronic condition(s) but not limited in activity, 0 otherwise
chcond21 if chronic condition(s) and limited in activity, 0 otherwise
doctorcoNumber of consultations with a doctor or specialist in the past 2 weeks
nondoccoNumber of consultations with non-doctor health professionals (chemist, optician, physiotherapist, social worker, district community nurse, chiropodist or chiropractor) in the past 2 weeks
hospadmiNumber of admissions to a hospital, psychiatric hospital, nursing or convalescent home in the past 12 months (up to 5 or more admissions which is coded as 5)
hospdaysNumber of nights in a hospital, etc. during most recent admission: taken, where appropriate, as the mid-point of the intervals 1, 2, 3, 4, 5, 6, 7, 8-14, 15-30, 31-60, 61-79 with 80 or more admissions coded as 80. If no admission in past 12 months then equals zero
medicineTotal number of prescribed and nonprescribed medications used in past 2 days
prescribTotal number of prescribed medications used in past 2 days
nonprescTotal number of nonprescribed medications used in past 2 days