In a case-cohort design, covariate histories are measured only on cases and a subcohort that is randomly selected from the entire cohort. This design has been widely used in large epidemiologic studies, especially when the exposures of interest are expensive to assemble for all the subjects. In this paper, we propose statistical procedures for analyzing case-cohort sampled current status data under the additive hazards model. Asymptotical properties of the proposed estimator are described and we suggest a resampling method to estimate the variances. Simulation studies show that the proposed method works well for finite sample sizes, and one data set is analyzed for illustrative purposes.
V souboru 39 případů adenokarcinomu in situ děložního hrdla byly sledovány: věk pacientek, cytologické, kolposkopické a histologické nálezy, operační výkony a definitivní řešení. Medián věku byl 38 let (24–75). Prebioptická suspekce žlázové léze byla vyslovena v 7 cytologických (18 %) a v 7 kolposkopických (18 %) nálezech. U 28 nemocných (72 %) byla současně přítomna koexistující skvamózní léze. V 16 případech (46 %) z 35 konizací byly popsány histologicky pozitivní okraje léze a u 15 z nich byl proveden opakovaný nebo definitivní operační výkon. V něm byl ve 2 případech již invazivní adenokarcinom. Klíčová slova: adenokarcinom in situ – cytologie – děložní hrdlo – kolposkopie – pozitivní okraje, In a series of 39 cases of adenocarcinoma in situ of the uterine cervix, age of patients, cytological, colposcopical and histological findings, operations and definitive solutions have been analyzed. Median age was 38 (24 – 75). Praebioptic suspicion of a glandular laesion was expressed in 7 cytological (18 %) and 7 colposcopical (18 %) findings. In 28 patients (72 %) the coexistent squamous laesion was concurrently present. In 16 cases (46 %) from 35 conisations histologically positive margins were described and in 15 of them repeated or definitive operation was performed. Among them, in 2 cases invasive adenocarcinoma was present. Key words: adenocarcinoma in situ – colposcopy – cytology – positive margine – uterine cervix, and doc. MUDr. Pavel Freitag, CSc.
The ascorbic acid (AA) concentration in anterior pituitary and blood plasma was measured by the Roe-Kuether method in control rats and rats treated with oestradiol benzoate alone, methylene blue alone and with both oestradiol and methylene blue. We have found that methylene blue alone caused a significant drop in hypophyseal both AA and plasma AA concentrations. Methylene blue treatment prevented the increase in plasma AA concentration in oestradiol benzoate-treated rats.