Table 2.
Multivariable mixed effect linear model of body mass index among breast cancer patients
| BMI at baseline, kg/m2 | Slope over time in BMI, kg/m2/year | |||
|---|---|---|---|---|
| Mean (SE)* | P | Mean (SE)* | P | |
| Race/ethnicity | ||||
| White | 27.85 (0.17) | Ref. | − 0.07 (0.02) | Ref. |
| Black | 31.88 (0.20) | < 0.001 | − 0.47 (0.02) | < 0.001 |
| Asian | 25.39 (0.60) | < 0.001 | − 0.30 (0.05) | < 0.001 |
| Hispanic | 29.54 (0.73) | 0.023 | − 0.08 (0.07) | 0.94 |
| Age at diagnosis | ||||
| < 50 | 28.75 (0.22) | Ref. | − 0.16 (0.02) | Ref. |
| ≥ 50 | 30.26 (0.16) | < 0.001 | − 0.33 (0.01) | < 0.001 |
| Carlson comorbidity index at diagnosis | ||||
| 0 | 29.30 (0.15) | Ref. | − 0.19 (0.01) | Ref. |
| 1+ | 30.96 (0.26) | < 0.001 | − 0.50 (0.02) | < 0.001 |
| Tumor stage | ||||
| 0 | 30.09 (0.34) | 0.064 | − 0.14 (0.03) | 0.82 |
| 1 | 29.42 (0.22) | Ref. | − 0.15 (0.02) | Ref. |
| 2 | 29.71 (0.21) | 0.35 | − 0.30 (0.02) | < 0.001 |
| 3 | 30.48 (0.36) | 0.016 | − 0.59 (0.03) | < 0.001 |
| Chemotherapy | ||||
| No | 29.48 (0.21) | Ref. | − 0.32 (0.02) | Ref. |
| Yes | 30.00 (0.20) | 0.10 | − 0.25 (0.02) | 0.009 |
| Smoking status at diagnosis | ||||
| Never | 29.56 (0.16) | Ref. | − 0.26 (0.01) | Ref. |
| Previous | 30.44 (0.24) | 0.002 | − 0.36 (0.02) | < 0.001 |
| Current | 29.25 (0.36) | 0.43 | − 0.20 (0.03) | 0.11 |
*Multivariable fitted mean body mass index (BMI) and standard errors (SE) as well as the fitted mean slope of BMI over time are presented. All the variables in the table were included in the multivariable model