Table 2.

Long-term variations of quality controls

Authors	Intraocular pressure	Medications taken	Visual acuity/fields	Bleb survival	Final result
Wang et al	Increased	N/A	N/A	Non modified	Negative
Inal et al	Increased in both groups	Increased	N/A	Compromised	Inconclusive
Ehrnrooth et al	Increased	Increased	N/A	Compromised	Inconclusive
Klink et al	Increased	N/A	N/A	Compromised	Negative
Shingleton et al	Increased	Stable	Improved	N/A	Inconclusive
Casson et al	Increased	Increased	N/A	Compromised	Negative
Rebolleda and Muñoz-Negrete	Increased	Increased	Reduced	Compromised	Negative
Mietz et al	Unchanged on average	Unchanged on average	Improved	N/A	Relatively favorable results
Donoso and Rodriguez	Reduced	None	N/A	N/A	Positive
Caprioli et al	Similar	N/A	N/A	N/A	Positive
Park et al	Similar	N/A	N/A	N/A	Positive
Swamynathan et al	Increased	N/A	Improved	N/A	Negative
Halikiopoulos et al	Increased	N/A	Improved	N/A	Negative

Abbreviation: N/A, not applicable.