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Table 3 Monte-carlo mean of F-statistics in each scenario using the proportion of patients who received the same treatment as proxy of instrument

From: Instrumental variable analysis in the context of dichotomous outcome and exposure with a numerical experiment in pharmacoepidemiology

n Level Weak Mod Strong
30000     
  High 14.14 101.32 432.00
  Med 16.95 105.93 458.32
  Low 17.65 108.05 465.88
20000     
  High 11.47 69.15 290.29
  Med 13.49 71.53 302.10
  Low 15.93 75.59 315.68
10000     
  High 8.96 36.64 147.29
  Med 11.76 39.26 152.53
  Low 12.48 42.80 161.04
  1. Legend: Low, Med (Medium), High denote level of confounding whereas Weak, Mod (Moderate), Strong stand for instrument strength. The number n with values 10000, 20000 and 30000 stands for the sample size