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. Author manuscript; available in PMC: 2014 Oct 11.
Published in final edited form as: Epidemiology. 2009 May;20(3):321–329. doi: 10.1097/EDE.0b013e31819e370b

Table 5.

Empirical evaluation of simple random sample controls are matched to the case on 5 year age at exit.

1 control 3 controls
True RR Estimated RR Empircal se Estimated se Estimated RR Empircal se Estimated se
1 1.01 0.047 0.045 1.00 0.031 0.029
2 2.02 0.045 0.046 2.02 0.030 0.029
4 4.10 0.065 0.060 4.06 0.035 0.035