The question that confronts you -- the question this entire lesson exists to answer -- is deceptively simple: which of these changes require you to go back to every enrolled participant and obtain new consent?

Get this wrong in one direction, and you waste weeks scheduling unnecessary reconsent visits, pulling participants away from their lives for a conversation about a change that does not affect them. Get it wrong in the other direction -- the dangerous direction -- and participants continue in a trial under consent that no longer accurately describes what is happening to them. Their autonomy has been compromised. Their consent is, in a meaningful sense, invalid.

This is not a theoretical concern. I have reviewed audit findings where sites failed to reconsent participants after the addition of a liver biopsy to a protocol, and I have seen equally troubling findings where sites reconsented for every trivial correction, eroding participant trust through sheer volume of paperwork. Neither extreme serves participants well. What serves participants is judgment -- informed, structured, defensible judgment about which changes matter.

This lesson gives you the framework for that judgment.

The question that confronts you -- the question this entire lesson exists to answer -- is deceptively simple: which of these changes require you to go back to every enrolled participant and obtain new consent?

Get this wrong in one direction, and you waste weeks scheduling unnecessary reconsent visits, pulling participants away from their lives for a conversation about a change that does not affect them. Get it wrong in the other direction -- the dangerous direction -- and participants continue in a trial under consent that no longer accurately describes what is happening to them. Their autonomy has been compromised. Their consent is, in a meaningful sense, invalid.

This is not a theoretical concern. I have reviewed audit findings where sites failed to reconsent participants after the addition of a liver biopsy to a protocol, and I have seen equally troubling findings where sites reconsented for every trivial correction, eroding participant trust through sheer volume of paperwork. Neither extreme serves participants well. What serves participants is judgment -- informed, structured, defensible judgment about which changes matter.

This lesson gives you the framework for that judgment.