[idlewords]

It does not; see the paper cited in my other reply to you. GCR dose is 1.5-2x on Mars compared to ISS.

The mention of "quality factor" here just begs the question. The reason we need research on biological effects of high-Z ion exposure is that it has a different mechanism of damage, not captured by that paradigm.

[Robotbeat]

GCR /alone/, maybe, but it’s, um, strange to pretend the substantial trapped radiation dose on ISS doesn’t exist, as you’re doing here (Table 2 in your linked paper shows the trapped dose at ISS is about equal to the GCR dose at ISS, so ignoring trapped dose makes your estimate off by approximately a factor of 2). It is the total effective dose (including quality factor) which matters, not cherry picking one particular source.

[idlewords]

The 2-3x uncertainty in tumor risk comes entirely from the heavy ion component of GCR. Please go back and re-read that section of my post if you need to.