Table 3

Crude and adjusted odds of the operation according to various risk factors (leakage scored as present if moderate or severe only)

Risk factorCrude odds (95% CI)Adjusted odds (95% CI)
*Cataract extraction+lens implant+trabeculectomy.
MMC, mitomycin C.
Any leak1.08 (0.56–2.09)0.98 (0.44–2.15)
Maximum leak grade 20.85 (0.42–1.72)
Maximum leak grade 30.76 (0.31–1.84)
Maximum leak grade 41.59 (0.59–4.26)
Asian2.74 (1.08–6.94)2.11 (0.71–6.22)
African Caribbean1.61 (0.73–3.56)2.12 (0.80–5.66)
Previous trabeculectomy2.22 (0.01–4.86)2.04 (0.73–5.70)
Chronic open angle glaucoma2.17 (0.91–5.22)1.84 (0.62–5.48)
Other glaucoma0.93 (0.44–1.97)0.57 (0.22–1.46)
Limbus base conj. flap1.11 (0.48–2.58)0.46 (0.12–1.87)
Previous cataract surgery2.51 (1.19–5.29)2.33 (0.82–6.67)
Other previous surgery2.45 (1.32–4.54)1.87 (0.86–4.07)
Trabeculectomy+5FU1.11 (0.52–2.35)0.68 (0.29–1.63)
Trabeculectomy+0.2 mg/ml MMC1.59 (0.49–5.10)1.47 (0.25–8.75)
Trabeculectomy+0.4 mg/ml MMC1.27 (0.13–12.3)0.37 (0.02–5.69)
Triple procedure*+5FU1.55 (0.55–4.35)2.07 (0.62–6.91)
Other complex procedure1.69 (0.56–5.08)0.74 (0.19–2.80)
Age (per year older)0.99 (0.97–1.01)0.97 (0.95–1.00)
Pilocarpine drops use in past1.07 (0.52–2.23)1.20 (0.53–2.73)
Adrenalin drops use in past1.78 (0.54–5.89)3.20 (0.78–13.2)
Betablocker drops use in past1.12 (0.36–3.42)1.37(0.35–5.43)
Systemic acetazolamide use in past1.25 (0.69–2.27)1.43 (0.73–2.80)