In addition, intraclass correlation coefficients (ICC) were calculated after adjustment for age, body mass index (BMI), menopausal status (pre or post), parity (parous and nonparous), hormone use (never, ever but not current, and current use) and case or control status.
Alec touched on this in his post on parity.
Prespecified (menopausal status, BMI and number of 1st degree family members with breast cancer) and data-driven post hoc (parity and age at first birth) subgroup analyses were also performed.
Then, if it is possible, the post-encoded parity bits are better protected by the considered modulation than the other non-re-encoded parity bits.
In fact, we have k systematic bits, P = 2 × λ × k post-encoded parity bits and 2 × (1 − λ) × ρ × k surviving parity bits after puncturing.
This choice is made because the systematic bits as well as the post-encoded parity bits are used by both decoders during the decoding process.
In order to reduce the loss in the convergence threshold, the authors consider first a time-varying construction of the post-encoded parity.
Besides, the time-varying post-encoder with a little irregularity and also the association of the 3D TC with high-order modulations, where both the systematic bits and the post-encoded parity bits are more protected than the other parity bits, create a sort of irregularity in the Gray mapping.
However, both of them exchange also extrinsic information about the post-encoded parity bits with the four-state SISO predecoder, and we have to take into account in the EXIT chart that the extrinsic information about these parity bits is changing from an iteration to the other.
Given λ, and without puncturing information bits, the highest achievable code rate is R max = 1 1 + 2 λ, since the overall code rate of the 3D TC is given by R = Data bits Systematic bits + Post-encoded parity bits + Other parity bits = 1 1 + 2 λ + 2 × 1 − λ × ρ, where 0 ≤ ρ ≤ 1 is the fraction of the surviving bits in y1 and y2 after puncturing.
Marc Pugh levelled, following up from close range after his initial effort had struck a post, but the parity was short-lived as Boruc did his best clown impression.
