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Table 4 Comparison of bleb morphology in the study group against the control group

From: Deterioration of filtering bleb morphology and function after phacoemulsification

Time after observation Observation 6 12 18
Commencement Commencement months months months
Group Trab then Phaco Trab Only Trab then Phaco Trab Only Trab then Phaco Trab Only Trab then Phaco Trab Only
Bleb morphology Surface Small 24% 26.4% 40% 26.4% 40% 26.4% 40% 27.8%
Medium 36% 45.8% 54% 47.2% 54% 47.2% 54% 45.8%
Large 20% 27.8% 6% 26.4% 6% 26.4% 6% 26.4%
Statistical analysis Z = 0.4 Z = 2.6 Z = 2.6 Z = 2.4
p = 0.7 p = 0.01 p = 0.01 p = 0.01
Elevation Elevated 96% 86.1% 66% 86.1% 66% 84.7% 66% 84.7%
Flat 4% 13.9% 34% 13.9% 34% 15.3% 34% 15.3%
Statistical analysis Z = 1.8 Z = 2.6 Z = 2.4 Z = 2.4
  p = 0.07 p = 0.009 p = 0.02 p = 0.02
  1. Regarded as statistically significant if p < 0,05, (the U Mann–Whitney test).
  2. Z – the value of test function for the given test.