Influenza A-infection and impact on incidence and severety of asthma in children before and after occurrence of the serotype H1N1 in 2009

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

DRKS

Registry ID

DRKS00015329

Enrollment

120

Registered

2018-09-27

Start date

2018-01-15

Completion date

Unknown

Last updated

2025-04-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

J45 J10.0

Interventions

Group 1: Group 1: children with non H1N1 influenza infection 1. identification of test persons by positive multiplex polymerase chain reaction screening of nasopharyngeal secretions, database includin

Eligibility

Sex/Gender

All

Age

No minimum to 18 Years

Inclusion criteria

Inclusion criteria: Influenza A infection, pathogen proven by polymerase chain reaction from nasopharyngeal secretions

Exclusion criteria

Exclusion criteria: any kind of chronic illness other than respiratory hypersensitivity

Design outcomes

Primary

Measure	Time frame
Identification of patients and proof of childhood asthma in children and adolescents <18 years suffering from influenza A infection in the years 2005-2018. Retrospective evaluation of patients with proof of influenza A (H1N1 and non-H1N1) in nasopharyngeal secretions by polymerase chain reaction. Proof of childhood asthma by means of catamnesis, physical examination, and lung function testing with spirometry and bodyplethysmography.	—

Measure

Time frame

Identification of patients and proof of childhood asthma in children and adolescents <18 years suffering from influenza A infection in the years 2005-2018. Retrospective evaluation of patients with proof of influenza A (H1N1 and non-H1N1) in nasopharyngeal secretions by polymerase chain reaction. Proof of childhood asthma by means of catamnesis, physical examination, and lung function testing with spirometry and bodyplethysmography.

—

Secondary

Measure	Time frame
Identification of patients and proof of childhood asthma in children and adolescents <18 years suffering from influenza A infection in the years 2005-2018. Retrospective evaluation of patients with proof of influenza A (H1N1 only) in nasopharyngeal secretions by polymerase chain reaction. Proof of childhood asthma by means of catamnesis, physical examination, and lung function testing with spirometry and bodyplethysmography.	—

Measure

Time frame

Identification of patients and proof of childhood asthma in children and adolescents <18 years suffering from influenza A infection in the years 2005-2018. Retrospective evaluation of patients with proof of influenza A (H1N1 only) in nasopharyngeal secretions by polymerase chain reaction. Proof of childhood asthma by means of catamnesis, physical examination, and lung function testing with spirometry and bodyplethysmography.

—

Countries

Germany

Contacts

Public ContactMartin Krause

Universitätsklinikum Schleswig-Holstein, Campus Kiel, Klinik für Kinder- und Jugendmedizin I

martin.krause@uksh.de0431 - 500 - 20123

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 4, 2026