scholarly journals The Influence of Bias on the Outcome of Prospective versus Retrospective Cephalometric Twin-Block Trials

Author(s):  
Trenouth MJ

Objective: This was to investigate whether a retrospective study inflates or deflates the treatment response compared to a prospective study.

Author(s):  
Partha Sarathi Patra ◽  
Abhishek Das ◽  
S.K. Mahiuddin Ahmed ◽  
Souveek Mitra ◽  
Gopal Krishna Dhali

2009 ◽  
Vol 15 (3) ◽  
pp. 106-109 ◽  
Author(s):  
Raimundo Francisco de Amorim Júnior ◽  
Suerda Emiliana Cavalcanti Dantas ◽  
Rodrigo de Holanda Mendonça ◽  
Abdiel de Lira Rolim ◽  
Maria Luiza de Carvalho Jales ◽  
...  

OBJECTIVES: To assess the occurrence of epileptic seizures (ES) in children and adolescents with hydrocephalus and their relationship with ventriculoperitoneal shunt (VPS) treatment. METHODS: Retrospective study of 45 patients from both genders, aged 0 to 18 years, with hydrocephalus and presenting with ES or not. The following variables were analyzed: gender, hydrocephalus etiology, age at diagnosis, age at initial VPS treatment, age at first ES and types of ES. RESULTS: Data analysis showed the following: 20 (44.4%) presented with ES, 13 (65%) of the girls and seven (35%) of the boys. There was a predominance of ES in the girls, but with no statistically significant difference. In total, 13 (65%) patients used VPS. Of the 13 patients with VPS and ES, it was observed that the onset of ES was after VPS in 10 (76.9%) individuals, whereas it occurred before VPS in two (15.4%). CONCLUSIONS: The results showed no association between VPS treatment and ES (ρ=0.832); however, most of the patients presented with their first ES episode after VPS, suggesting a possible relationship between this treatment and the occurrence of ES. A larger sample and a prospective study might answer this question.


2014 ◽  
Vol 11 ◽  
pp. 39-44 ◽  
Author(s):  
Eesha Sharma ◽  
Ganesan Venkatasubramanian ◽  
Shivarama Varambally ◽  
Palanimuthu T. Sivakumar ◽  
Doddaballapur.K. Subbakrishna ◽  
...  

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