Chi-Square Contingency Table Analysis

2008 ◽  
Author(s):  
Phillip E. Pfeifer
Keyword(s):  
Contingency Table ◽  
Contingency Table Analysis ◽  
Chi Square ◽  
Square Contingency Table ◽  
Table Analysis

Locus of Control and Work Limitations of Handicapped Women

1980 ◽  
Vol 11 (1) ◽  
pp. 40-43 ◽  
Author(s):  
Robert M. Harris ◽  
David Hollingsworth
Keyword(s):  
Locus Of Control ◽  
Contingency Table ◽  
Environmental Control ◽  
Activity Limitations ◽  
Contingency Table Analysis ◽  
Chi Square ◽  
Work Limitations ◽  
Table Analysis ◽  
The Impact ◽  
The Relationship

Onset of a disabling condition whether it implies primacy or not usually brings with it a change in the person’s perception of the environment. Traditionally, Rotter's locus of control has been used to describe an individual's psychological orientation to the environment. Studies which investigate the impact of disability on locus of control are all but lacking. This study investigates the relationships between women with work or activity limitations and their perceptions of personal and environmental control. Correlational and chi-square (contingency table).analysis are used to discuss the relationship.

The impact-absorbing effects of facial fractures in closed-head injuries

1987 ◽  
Vol 66 (4) ◽  
pp. 542-547 ◽  
Author(s):  
K. Francis Lee ◽  
Louis K. Wagner ◽  
Y. Eugenia Lee ◽  
Jung Ho Suh ◽  
Seung Ro Lee
Keyword(s):  
Head Injuries ◽  
Closed Head Injury ◽  
Neurological Deficits ◽  
Facial Fractures ◽  
Contingency Table Analysis ◽  
Chi Square ◽  
Content Type ◽  
Closed Head ◽  
Table Analysis ◽  
The Impact

✓ A series of 210 patients with facial fractures sufficiently severe to require cranial computerized tomography (CT) to evaluate suspected closed-head injury (CHI) was studied. The injuries were separated into five grades of severity based on neurological examination, including cranial CT. The injuries were also grouped into three categories based on facial regional involvement, using chi-square contingency table analysis. The data demonstrated that patients with upper facial fractures were at greatest risk for serious CHI. Injuries to both the mandibular and the midfacial regions with no upper facial involvement more frequently resulted in mild CHI with a modest likelihood of no neurological deficits. Trauma to only the mandibular region or to only the midfacial region was least likely to involve CHI.

Comparison Of Distant Relapse Rates Of Immune Thromocytopenia In Patients Treated With Steroids Versus Anti-Rh(D) with/Without Steroids Versus Rituximab with/Without Steroids

Blood ◽  
2013 ◽  
Vol 122 (21) ◽  
pp. 4760-4760
Author(s):  
Mala Varma ◽  
Michael L. Grossbard
Keyword(s):  
Platelet Count ◽  
Off Label Use ◽  
Contingency Table Analysis ◽  
Chi Square ◽  
Distant Relapse ◽  
Institutional Review Board Approval ◽  
Institutional Review ◽  
Table Analysis ◽  
Relapse Rates

Background Among therapies for immune thrombocytopenia (ITP) that achieve long unmaintained remissions, distant relapse rates have not been compared. Specific Aims To compare relapse rates following umaintained remissions exceeding 1 year in patients with ITP treated with steroids versus anti-Rh(D) with/without steroids versus rituximab with/without steroids. Methods Institutional Review Board approval was obtained. The charts of 52 consecutive patients with ITP followed in a hematology practice between 07/01/03 and 06/30/13 were reviewed. Remission was defined as a platelet count > 100,000/µL. Patients with the aforementioned treatment and remission characteristics were identified. Steroids were administered alone as dexamethasone 40 mg PO daily for 4 days. Anti-Rh(D) was administered as 75 mcg/kg IV with or without prednisone 60-85 mg PO daily tapered over 4 weeks or dexamethasone 40 mg PO daily for 4 days. Rituximab was administered as 375 mg/m2 IV weekly for 4 weeks or as a single dose with or without dexamethasone 40 mg PO daily for 4 days. Relapse was defined as a platelet count < 30,000/µL. Statistical calculations included ANOVA to compare demographics and chi-square contingency table analysis to compare distant relapse rates (http://www.physics.csbsju.edu/stats). Results There were 16 unmaintained remissions exceeding 1 year in 13 patients following treatment with steroids, anti-Rh(D) with/without steroids, or rituximab with/without steroids. Mean age on presentation, sex ratio, duration of ITP prior to therapy, and duration of follow-up after therapy were similar for the 3 groups (Table 1). Distant relapse rates were 100%, 14.2%, and 66.7% for the steroid, anti-Rh(D) with/without steroid, and rituximab with/without steroid groups, respectively, P = 0.03 (Table 2). Conclusion Among patients who achieve long unmaintained remissions of ITP with steroids, anti-Rh(D) with/without steroids, or rituximab with/without steroids, those treated with anti-Rh(D)-based therapy are the most likely to have extended remission. Disclosures: Off Label Use: Rituximab therapy of ITP.

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