Table 1 Distribution of selected characteristics among participants
From: A metabolome-wide case-control study of african american breast cancer patients
|  | Controls (n = 125) | Cases (n = 125) |
|---|---|---|
Characteristics | Â | |
Age at enrollment, mean ± SD | 57.1 ± 13.8 | 58.0 ± 13.9 |
Marital status, n (%) | Â | Â |
Single | 63 (50.4) | 61 (48.8) |
Married or partnered | 18 (14.4) | 34 (27.2) |
Divorced or widowed | 44 (35.2) | 30 (24.0) |
Current tobacco smoker, n (%) | Â | Â |
No | 74 (59.2) | 108 (86.4) |
Yes | 51 (40.8) | 17 (13.6) |
Current alcohol drinker, n (%) | Â | Â |
No | 48 (38.4) | 69 (55.2) |
Yes | 77 (61.6) | 56 (44.8) |
Type 2 diabetes, n (%) | Â | Â |
No | 108 (86.4) | 111 (88.8) |
Yes | 17 (13.6) | 14 (11.2) |
Area Deprivation Index national rank, Median (interquartile range) | 71 (57–85) | 66 (49–80) |
Cancer-related characteristics | ||
Cancer stage group | Â | Â |
I | Â | 49 (39.2) |
II | Â | 58 (46.4) |
III | Â | 18 (14.4) |
Lymph node involvement | Â | Â |
Negative | Â | 72 (57.6) |
1–3 node positive |  | 45 (36.0) |
4 + node positive |  | 7 (4.8) |
Missing | Â | 1 (0.8) |
Surgery, n (%) | Â | Â |
No | Â | 3 (2.4) |
Yes, after serum collection | Â | 97 (77.6) |
Yes, before serum collection | Â | 25 (20.0) |
Chemotherapy, n (%) | Â | Â |
No | Â | 47 (37.6) |
Yes, after serum collection | Â | 32 (25.6) |
Yes, before serum collection | Â | 46 (36.8) |
Radiotherapy, n (%) | Â | Â |
No | Â | 43 (34.4) |
Yes, after serum collection | Â | 73 (58.4) |
Yes, before serum collection | Â | 9 (7.2) |
Any treatment before serum collection, n (%) | Â | Â |
No | Â | 68 (54.4) |
Yes | Â | 57 (45.6) |