Clinical Study

Joint Assessment of Intended and Unintended Effects of Medications: An Example Using Vascular Endothelial Growth Factor Inhibitors for Neovascular Age-Related Macular Degeneration

Table 1

Model inputs, intended and unintended effects.

Intended EffectsPegaptanib ( 𝑛 = 2 9 4 )1 𝑛 ( % ) Ranibizumab ( 𝑛 = 3 7 9 )2 𝑛 ( % ) UC Combined ( 𝑛 = 6 7 7 ) 3 𝑛 ( % )

 Loss of 6 lines ETDRS VA28 (9.5)3 (0.8)118 (39.9)
 Loss of 3 but < 6 lines ETDRS VA60 (20.4)15 (4.0)153 (51.7)
 Loss of > 0 but < 3 lines ETDRS VA108 (36.7)83 (21.9)227 (76.7)
 Gain of 0 but < 3 lines ETDRS VA80 (27.2)140 (36.9)153 (51.7)
 Gain of 3 lines ETDRS VA18 (6.1)138 (36.4)26 (8.8)

Unintended Effects

 Nonfatal MI, % (SE)0.3 (0.378)1.1 (0.525)0.6 (0.295)
 RR (95% CI) Nonfatal MI, versus UC0.5 (0.0–5.5)2.0 (0.4–10.9)
 Nonfatal CVA, % (SE)1.0 (0.586)1.1 (0.525)0.4 (0.255)
 RR (95% CI) Nonfatal CVA, versus UC3.0 (0.3–28.9)2.0 (0.4–10.9)
 Nonfatal severe NOH, % (SE)1.0 (0.653)1.5 (0.614)0.6 (0.295)
 RR (95% CI) Nonfatal severe NOH, versus UC1.0 (0.2–4.9)5.5 (0.7–46.3)

1From VISION Study [6] of 0.3 mg pegaptanib, and VISION-study safety and efficacy summaries provided by Pfizer Inc.
2Pooled estimates from MARINA and ANCHOR [7, 8] studies of 0.5 mg ranibizumab.
3Pooled estimates from the control arms of the VISION [6], ANCHOR and MARINA [7, 8] studies.
ETDRS VA: Early Treatment of Diabetic Retinopathy Study visual acuity; MI: myocardial infarction; SE-standard error; 95%CI: 95% confidence interval; UC: Usual care; NOH: nonocular hemorrhage.