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Table 1 Baseline socio-demographic and clinical characteristics of patients included in this study (n = 1019)

From: Longitudinal changes in sports activity from pre-diagnosis to first five years post-diagnosis: a prospective Chinese breast cancer cohort study

Characteristics Number of patients Frequency, %
Age, mean ± SD, year 52.1 ± 8.8  
Education level
 High school or below 868 85.2
 Collage or above 151 14.8
Marital status
 Married or cohabitating 728 71.4
 Unmarried or divorced or widowed 291 28.6
Household income (HKD/month)
  < 15,000 463 45.4
 15,000-30,000 326 32.0
 30,000-50,000 151 14.8
  ≥ 50,000 79 7.8
Employment status
 Full time 378 37.1
 Part time 129 12.7
 Not working 512 50.2
Menopausal status
 Pre-menopausal 539 52.9
 Post-menopausal 480 47.1
BMI at diagnosis, kg/m2
 Underweight (< 18.5) 37 3.6
 Normal (18.5–22.9) 488 47.9
 Overweight (23–24.9) 209 20.5
 Obese (≥25) 285 28.0
Number of comorbidities
 None 629 61.7
 1 259 25.4
 2 101 9.9
 ≥ 3 30 2.9
AJCC stage at diagnosis
 0-I 375 36.9
 II 471 46.2
 III 169 16.6
 Missing 4 0.4
Histology
 IDC 858 84.2
 ILC 31 3.0
 DCIS 56 5.5
 Others 74 7.3
ER status
 Positive 763 74.9
 Negative 233 22.9
 Missing 23 2.3
PR status
 Positive 598 58.7
 Negative 395 38.8
 Missing 26 2.6
HER 2 status
 Positive 274 26.9
 Negative 686 67.3
 Missing 59 5.8
Surgery
 Mastectomy 628 61.6
 Conservation 391 38.4
Chemotherapy
 Yes 774 76.0
 No 245 24.0
Radiotherapy
 Yes 721 70.8
 No 298 29.2
Endocrine therapy
 Yes 777 76.3
 No 242 23.7
Smoking status
 Yes 11 1.1
 No 1008 98.9
Drinking status
 Yes 15 1.5
 No 1004 98.5
  1. Abbreviations: SD standard deviation, HKD Hong Kong dollars, BMI body mass index, AJCC American joint Committee on cancer, IDC invasive ductal carcinoma, ILC invasive lobular carcinoma, DCIS ductal carcinoma in situ, ER estrogen receptor, PR progesterone receptor, HER 2 human epidermal-growth-factor receptor 2
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