Table 3 Multiple linear regression models on Age, chronic illness, PWS, TFEQ, and BMI (low weight, high weight)

Females

Age

− 0.01 (0.01)/0.434

− 0.01 (0.01)/0.349

− 0.003 (0.01)/0.818

− 0.01 (0.02)/0.679

− 0.01 (0.05)/0.813

Chronic illness (no)

− 0.02 (0.10)/0.879

0.01 (0.14)/0.951

− 0.18 (0.13)/0.177

0.13 (0.17)/0.471

− 1.33 (0.54)/0.014

PWS

0.04 (0.01)/< .001*

0.04 (0.01)/0.003*

0.04 (0.01)/0.004*

0.05 (0.02)/0.002*

–

Low weight (Ref)

− 0.12 (0.05)/0.020*

0.02 (0.07)/0.796

− 0.29 (0.07)/< .001*

− 0.09 (0.09)/0.322

− 0.64 (0.28)/0.024*

High weight (Ref)

− 0.11 (0.05)/0.037*

− 0.19 (0.08)/0.014*

− 0.08 (0.07)/0.257

− 0.07 (0.10)/0.468

0.74 (0.30)/0.013*

R² (Adj. R²)

0.08 (0.06)

0.04 (0.02)

0.08 (0.07)

0.03 (0.02)

0.05 (0.04)

Males

Age

0.002 (0.02)/0.902

− 0.02 (0.02)/0.439

0.02 (0.02)/0.421

0.004 (0.03)/0.866

− 0.09 (0.08)/0.223

Chronic illness (no)

− 0.04 (0.12)/0.734

− 0.26 (0.15)/0.082

0.03 (0.16)/0.852

0.11 (0.20)/0.579

− 0.04 (0.59)/0.946

PWS

0.05 (0.01)/< .001*

0.04 (0.01)/0.004*

0.03 (0.02)/0.059*

0.08 (0.02)/< .001*

–

Low weight (Ref)

− 0.05 (0.07)/0.469

− 0.01 (0.08)/0.910

− 0.25 (0.09)/0.004*

0.12 (0.11)/0.275

− 0.52 (0.32)/0.107

High weight (Ref)

0.11 (0.06)/0.047*

− 0.01 (0.07)/0.905

0.27 (0.07)/< .001*

0.07 (0.09)/0.429

0.94 (0.27)/< .001*

R² (Adj. R²)

0.09 (0.07)

0.04 (0.02)

0.11 (0.10)

0.06 (0.04)

0.06 (0.05)