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Table 2 Tests included/excluded in the regression analysis

From: How does study quality affect the results of a diagnostic meta-analysis?

Tests included in the regression analysis (number of studies)

Tests for which there were insufficient studies to permit regression analysis (number of studies)

Diagnosis

Dipstick: nitrite (23), LE (14), nitrite or LE positive (15)

Clinical history (6)

Microscopy: pyuria (28), bacteriuria (22)

Dipstick: nitrite and LE positive (9), glucose (4), protein (2), blood (1), protein and LE positive (1), combinations of 3 dipstick tests (5)

 

Microscopy: pyuria or bacteriuria (8), pyuria and bacteriuria (8)

 

Culture: standard (1), dipslide (1)

 

Combinations of different tests (10)

Localisation

Ultrasound (20)

Clinical history (5)

 

Laboratory based tests (16)

 

Imaging techniques: MCUG (7), MRI (1), CT (1), IVP (4), cystography (2), scintigraphy (3)

Further investigation

Detection of reflux: Ultrasound (28): standard (11), contrast enhanced (17)

Detection of reflux: IVP (4), voiding radionuclide cystography (3), NAG/creatinine ratio (1), scintigraphy, (3), risk scoring system (1)

 

Prediction of scarring: ultrasound (2), IVP (1), non-invasive indicators (1), MCUG (2)

 

Detection of scarring: IVP (4), static scintigraphy (7), dynamic scintigraphy (2), MCUG (4), cystography (1), MRI (1), US and MCUG (1)