We have no meanings for "control study" in our records yet.
1 Level of evidence: Level III study, It is a case control study .
2 Design: Case- control study with 12 weeks' longitudinal follow-up to determine treatment response.
3 Methods: A retrospective case- control study was performed at 4 health maintenance organizations.
4 Methods: Case- control study , food trace-back and microbiologic investigations were promptly carried out.
5 One case- control study involving European patients with type 1 diabetes was included.
6 Methods: A population based case- control study was conducted in 2 French agglomerations.
7 Study design, size, duration: A case- control study including three groups of patients.
8 Methods: A case- control study was conducted based on Massachusetts birth certificate data.
9 Patients and methods: A prospective case- control study in a district general hospital.
10 Methods: A paired case- control study adjusted by age and gender was conducted.
11 A retrospective case- control study was performed with two matched controls per case.
12 A nested case- control study was subsequently performed to investigate potential risk factors.
13 Methods: A population based case- control study was conducted among women in Michigan.
14 A case- control study was conducted to determine occupational risk factors for infection.
15 Design: A population-based, retrospective case- control study using the Houston Tuberculosis Initiative database.
16 To exclude non-specific changes, a control study with sham smoking was performed.
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