We investigated the relation between benign ovarian tumours and lactose among 746 case women identified at seven New York metropolitan hospitals and 404 community controls, age and hospital frequency matched to the expected case distribution.
The number of days spent in hospital, frequency of hospital admission, compulsory hospital admission and prescription of antipsychotics or non-antipsychotic mood stabilisers over a 5-year follow-up period.
The following data were recorded: symptoms from the respiratory tract, ears and sinuses, treatment with antibiotics, numbers of bacterial cultures, times and reasons of visits to hospitals, frequency of travelling abroad and adherence to study drug.
Incident cases were primary lung cancers diagnosed at any one of three major hospitals in the country over the study period, and controls were patients admitted to the same hospitals, frequency-matched by age.
In 2000, one of the authors noted the increased clinical severity of P. vivax cases seen in this same hospital; the frequency of hospitalization was very similar to that of patients infected with P. falciparum (M.G.C.A., unpub. data).
Main outcome measures Hospital contacts for head injuries ascertained from hospital register; frequency of history of head injury.
MAIN OUTCOME MEASURES: Quality of life, duration of postoperative hospital stay, frequency of hospital readmission, overall direct medical costs, and mortality rate.
Secondary end points were total duration of hospital admission, frequency of readmission, toxicity of treatment and resource utilisation.
However, adding hospital referral frequency to our multivariate analyses showed no influence of referral on overall and relative survival or RER.
The study included 280 incident cases (240 acute lymphoblastic leukaemia and 40 acute non-lymphoblastic leukaemia) and 288 hospital controls, frequency matched by age, gender, hospital, catchment area of the hospital and ethnic origin.
However, in a later study also carried in our hospital, the frequency of 16/18 HPV types was similar to our present study (41% in all types of lesions) [23].
