Early age at debut is a predictor of steroid-dependent and frequent relapsing nephrotic syndrome.

The purpose of this study was to identify characteristics of patients with steroid-sensitive nephrotic syndrome (SSNS) that point to a high risk of frequent relapsing (FR) or steroid-dependent (SD) SSNS. A retrospective analysis of 54 consecutive patients with SSNS was performed. In this cohort, the incidence of idiopathic NS was 1.

[22q11 deletion syndrome].

22q11 deletion syndrome (formerly named CATCH22, DiGeorge, Velo-Cardio-Facial, Caylor, Kinouchi and Shprintzen syndrome) occurs in approximately 1/2000 to 4000 children. The genetic lesion is remarkably uniform, occurring mainly as 3 or 1.5 MB deletions in the 22q11.

Clustering of acute respiratory infection hospitalizations in childcare facilities.

Aim: To estimate how risk of acute respiratory infection (ARI) hospitalization in children attending childcare facilities with a recently (within 1 month) hospitalized child is affected by gender, age and other characteristics.

Methods: Population-based prospective cohort study of 436 434 Danish 0-5-year-old children attending childcare during 1989-2004. Information was collected from Danish registers.

Association between social position and congenital anomalies: a population-based study among 19,874 Danish women.

Aims: To examine the association between maternal and paternal educational level and household income and the risk of giving birth to a baby with a congenital anomaly in a population of Danish women.

Methods: We performed a population-based cohort study, based on record linkage of data from Danish administrative registries. For each pregnant woman in the cohort, we described financial and educational resources and congenital anomalies in her offspring.

Associations between socio-economic factors and the use of prescription medication during pregnancy: a population-based study among 19,874 Danish women.

Objective: To examine the association between socio-economic factors and use of prescription medication during pregnancy in a population of Danish women.

Methods: This was a population-based cohort study. Using record linkage from public administrative registries, we described the use of prescription medication during pregnancy and the financial and educational resources for each pregnant woman in the cohort.

Socioeconomic factors and risk of hospitalization with infectious diseases in 0- to 2-year-old Danish children.

Although the association between low socioeconomic status and illness in childhood is well known, the impact of socioeconomic factors on risk and frequency of hospitalizations for infectious diseases, the most frequent disease category, during the first 2 years of life has scarcely been studied. Through linkage of records drawn from public administrative and health registries, we conducted a population-based cohort study of 5024 Danish children born in 1997 to examine the frequency of hospitalization for infectious diseases in very young children. The main exposure variables, adjusted for potential confounding factors, were mother's education level, household income, and cohabitation status.

Socioeconomic factors and prescription of antibiotics in 0- to 2-year-old Danish children.

Objectives: The aim was to examine the impact of socioeconomic factors on the use of systemic antibiotics during the first 2 years of life.

Methods: This was a population-based cohort study of 5024 Danish children born in 1997. The study was conducted by linking records drawn from public administrative registries.