Table 1.
Descriptive statistics by research sample
| Attrition patient sample, baseline characteristics (N in parentheses) | Studied patient sample (N = 44) | P value (mean difference between the attrition and studied patient samples) | ||||||
|---|---|---|---|---|---|---|---|---|
| N | Mean | SD | 95% CI for mean | Mean | SD | 95% CI for mean | ||
| Fatigue | ||||||||
| Baseline | ||||||||
| Fatigue score | 118 | 0.53 | 1.46 | 0.27–0.80 | 0.30 | 1.17 | −0.06–0.65 | 0.33 |
| Any fatigue | 118 | 0.14 | 0.35 | 0.08–0.21 | 0.09 | 0.29 | 0.01–0.18 | 0.37 |
| Clinically significant fatigue | 118 | 0.08 | 0.28 | 0.03–0.14 | 0.02 | 0.15 | −0.02–0.07 | 0.07 |
| 9 months and after | ||||||||
| Fatigue score | 1.68 | 2.26 | 0.99–2.37 | |||||
| Any fatigue | 0.41 | 0.50 | 0.26–0.56 | |||||
| Clinically significant fatigue | 0.25 | 0.44 | 0.12–0.38 | |||||
| Demographics, baseline | ||||||||
| Age 45 and below | 127 | 0.22 | 0.42 | 0.15–0.29 | 0.39 | 0.49 | 0.24–0.54 | 0.03 |
| Race/ethnicity | ||||||||
| White | 127 | 0.75 | 0.43 | 0.68–0.83 | 0.86 | 0.35 | 0.76–0.97 | 0.14 |
| African American | 127 | 0.20 | 0.40 | 0.13–0.27 | 0.09 | 0.29 | 0.01–0.18 | 0.06 |
| Other | 127 | 0.05 | 0.21 | 0.01–0.08 | 0.05 | 0.21 | −0.02–0.11 | 0.96 |
| Married | 126 | 0.81 | 0.39 | 0.74–0.88 | 0.91 | 0.29 | 0.82–1.00 | 0.08 |
| Has any child | 202 | 0.84 | 0.37 | 0.79–0.89 | 0.84 | 0.37 | 0.73–0.95 | 0.99 |
| Biological variables, baseline | ||||||||
| Baseline | ||||||||
| BMI ≥ 25 | 121 | 0.52 | 0.50 | 0.43–0.61 | 0.45 | 0.50 | 0.30–0.61 | 0.46 |
| Reached menopause | 127 | 0.63 | 0.48 | 0.55–0.72 | 0.52 | 0.51 | 0.37–0.68 | 0.21 |
| Tumor size | 127 | 1.28 | 0.64 | 1.16–1.39 | 1.30 | 0.59 | 1.11–1.48 | 0.86 |
| Number of positive nodes | 126 | 1.87 | 5.28 | 0.93–2.80 | 0.95 | 1.92 | 0.37–1.54 | 0.10 |
| ER positive | 127 | 0.76 | 0.43 | 0.69–0.84 | 0.91 | 0.29 | 0.82–0.99 | 0.01 |
| Her2Neu positive | 127 | 0.18 | 0.39 | 0.11–0.25 | 0.16 | 0.37 | 0.05–0.27 | 0.74 |
| Hemoglobin, actual value | 169 | 13.08 | 1.62 | 12.84–13.33 | 13.11 | 1.73 | 12.58–13.64 | 0.93 |
| Hemoglobin > =11 | 169 | 0.93 | 0.25 | 0.90–0.97 | 0.93 | 0.25 | 0.85–1.01 | 0.94 |
| Glucose, actual value | 162 | 101.54 | 36.66 | 95.85–107.23 | 99.34 | 22.40 | 92.53–106.15 | 0.71 |
| Glucose > =110 | 162 | 0.21 | 0.41 | 0.15–0.27 | 0.16 | 0.37 | 0.05–0.27 | 0.46 |
| White blood cell, actual value | 169 | 7.00 | 2.55 | 6.61–7.39 | 6.48 | 1.75 | 5.95–7.01 | 0.21 |
| White blood cell abnormal | 169 | 0.30 | 0.46 | 0.23–0.37 | 0.34 | 0.48 | 0.20–0.49 | 0.62 |
| Affected limb volume | 116 | 1,299.76 | 396.93 | 1,226.76–1,372.76 | 1,207.93 | 233.67 | 1,136.89–1,278.97 | 0.07 |
| Biological variables, 9 months and after | ||||||||
| BMI > =25 | 0.45 | 0.50 | 0.30–0.61 | |||||
| Hemoglobin, actual value | 12.68 | 1.13 | 12.33–13.02 | |||||
| Hemoglobin > =11 | 0.91 | 0.29 | 0.82–1.00 | |||||
| Glucose, actual value | 99.91 | 37.48 | 88.52–111.31 | |||||
| Glucose > =110 | 0.16 | 0.37 | 0.05–0.27 | |||||
| White blood cell, actual value | 5.70 | 1.62 | 5.21–6.19 | |||||
| White blood cell abnormal | 0.20 | 0.41 | 0.08–0.33 | |||||
| Affected limb volume | 1,253.93 | 250.39 | 1,177.81–1,330.06 | |||||
| Treatment variables | ||||||||
| Type of surgery | ||||||||
| Lumpectomy | 0.39 | 0.49 | 0.24–0.54 | |||||
| Modified mastectomy | 0.52 | 0.51 | 0.37–0.68 | |||||
| Simple mastectomy | 0.09 | 0.29 | 0.01–0.18 | |||||
| Had chemotherapy | 0.52 | 0.51 | 0.37–0.68 | |||||
| Had XRT | 0.68 | 0.47 | 0.54–0.83 | |||||
| Had hormonal therapy | 0.86 | 0.34 | 0.76–0.97 | |||||
| Functioning variables, 12 months and after | ||||||||
| Vigorous activity | ||||||||
| Time vigorous activity, weekday | 0.81 | 0.91 | 0.53–1.08 | |||||
| Time vigorous activity, weekend | 1.19 | 1.19 | 0.83–1.56 | |||||
| Average time on vigorous activity (per day) | 0.92 | 0.92 | 0.64–1.20 | |||||
| Sleeping | ||||||||
| Time sleeping weekday | 8.13 | 1.15 | 7.77–8.48 | |||||
| Time sleeping weekend | 8.53 | 1.04 | 8.22–8.85 | |||||
| Average time sleeping (per day) | 8.33 | 1.04 | 8.01–8.65 | |||||
| Physical function | ||||||||
| Physical function subscale | 86.93 | 13.78 | 82.74–91.12 | |||||
| Physical function total composite | 78.73 | 13.91 | 74.50–82.96 | |||||
| Mental health | ||||||||
| Mental health score | 63.09 | 13.47 | 58.99–67.19 | |||||
| Mental health total composite | 72.27 | 14.10 | 67.99–76.56 | |||||
| Vitality | 49.77 | 17.75 | 44.38–55.17 | |||||
| Social function | 89.30 | 18.13 | 83.78–94.81 | |||||