Table 2.

Correlation between selected variables and clinically significant fatigue at ≥9 months after baseline measures

N = 44	Coefficient
Demographics, baseline
Age 45 and below	−0.243
Race/ethnicity
White	0.076
African American	0.000
Other	−0.126
Married	0.000
Has any child	0.108
Biological variables, baseline
Baseline
BMI > =25	0.422***
Reached menopause	0.236
Tumor size	0.050
Number of positive nodes	−0.308**
ER positive	−0.183
Her2Neu positive	−0.108
Hemoglobin, actual value	0.039
Hemoglobin > =11	0.156
Glucose, actual value	0.197
Glucose > =110	0.036
White blood cell, actual value	0.432***
White blood cell abnormal	0.360**
Affected limb volume	−0.027
Biological variables, 9 months and after
BMI > =25	0.316**
Hemoglobin, actual value	−0.079
Hemoglobin > =11	−0.183
Glucose, actual value	0.172
Glucose > =110	0.036
White blood cell, actual value	0.382**
White blood cell abnormal	−0.033
Affected limb volume	0.188
Limb volume increase 100 cc or more	0.329**
Treatment variables
Type of surgery
Lumpectomy	0.189
Modified mastectomy	−0.183
Simple mastectomy	0.000
Had chemotherapy	−0.079
Had XRT	−0.056
Had hormonal therapy	−0.229
Functioning variables, 12 months and after
Vigorous activity
Time vigorous activity, weekday	−0.314**
Time vigorous activity, weekend	−0.125
Average time on vigorous activity (per day)	−0.259*
Sleeping
Time sleeping weekday	0.063
Time sleeping weekend	−0.036
Average time sleeping (per day)	0.051
Physical function
Physical function subscale	−0.302**
Physical function total composite	−0.161
Mental health
Mental health score	0.125
Mental health total composite	−0.147
Vitality	−0.176
Social function	0.106

Spearman correlation coefficients presented in the table. Clinically significant fatigue is defined as fatigue score ≥ 4

*p ≥ 0.10; **p < 0.05; ***p < 0.01; ****p < 0.001