Copyright
©The Author(s) 2003.
World J Gastroenterol. Feb 15, 2003; 9(2): 309-311
Published online Feb 15, 2003. doi: 10.3748/wjg.v9.i2.309
Published online Feb 15, 2003. doi: 10.3748/wjg.v9.i2.309
Table 1 Results of the 4 tests in detecting Helicobacter pylori
Helicobacter pylori status | CLO test | Histology | Antral biopsy culture | String test culture | Number of patients (n = 30) |
+ | + | + | + | + | 8* |
+ | + | + | + | - | 9 |
+ | + | + | - | - | 4 |
- | - | + | - | - | 1 |
- | - | - | - | - | 8 |
Table 2 The sensitivity, specificity, positive predictive value, negative predictive value and the accuracy of the string test compared to endoscopy-based tests
Sensitivity % | Sensitivity % | PPV % | NPV % | Accuracy % | |
CLO test | 100 | 100 | 100 | 100 | 100 |
Antral histology | 100 | 95 | 89 | 100 | 97 |
Antral biopsy culture | 81 | 100 | 100 | 69 | 77 |
String test culture | 38 | 100 | 100 | 41 | 57 |
Table 3 The results of the string test according to the growth rate of cultures from endoscopic biopsies
Cultures of endoscopic biopsies and growth rate of Helicobacter pylori | ||||
Abundant | Moderate | Scant | No growth | |
String test negative (n = 22) | 1 | 2 | 6 | 13 |
String test positive (n = 8) | 4 | 1 | 3 | 0 |
Total | 5 | 3 | 8 | 14 |
Table 4 The results of the string test according to the density of Helicobacter pylori on antral histology
Antral histology and density of Helicobacter pylori | ||||
Marked | Moderate | Mild | None present | |
String test negative (n = 22) | 4 | 8 | 2 | 8 |
String test positive (n = 8) | 4 | 2 | 2 | 0 |
Total | 8 | 10 | 4 | 8 |
-
Citation: Leong RW, Lee CC, Ling TK, Leung WK, Sung JJ. Evaluation of the string test for the detection of
Helicobacter pylori . World J Gastroenterol 2003; 9(2): 309-311 - URL: https://www.wjgnet.com/1007-9327/full/v9/i2/309.htm
- DOI: https://dx.doi.org/10.3748/wjg.v9.i2.309