| Δ0 | sleeping on the left side itself | sleeping on the left side of the body |
| Δ1 | other specific sleeping positions | sleeping on the right side, sleeping on the back, sleeping on the stomach, sleeping in a fetal curl |
| Δ2 | other nightly sleep-setup habits | pillow height, mattress firmness, sleeping with a night light on, using a body pillow |
| Δ3 | other everyday body-posture habits while awake | sitting posture at a desk, standing posture, crossing your legs while sitting, carrying a bag on one shoulder |
| Δ4 | other everyday personal health habits unrelated to posture | meal timing, water intake, screen time before bed, caffeine consumption |
| Δ5 | everyday lifestyle choices unrelated to health | choice of wall paint color, brand of wristwatch, taste in music, preferred font for reading |