Table 1 General characteristics of study population
From: Blood cadmium and volume of uterine fibroids in premenopausal women
Variables | All subjects (N = 288) | Women with uterine fibroids (N = 46) | Women without uterine fibroids (N = 242) | P |
|---|---|---|---|---|
Number (%) | Number (%) | Number (%) | ||
Age | ||||
<40 years old | 218 (75.7) | 25 (54.4) | 193 (79.8) | <0.001 |
≥40 years old | 70 (24.3) | 21 (45.7) | 49 (20.3) | |
Education | ||||
≤High school | 92 (31.9) | 18 (39.1) | 74 (30.6) | 0.333 |
≥University | 196 (68.1) | 28 (60.9) | 168 (69.4) | |
Income/monthly | ||||
< | 156 (54.4) | 26 (56.5) | 130 (53.9) | 0.873 |
≥ | 131 (45.6) | 20 (43.5) | 111 (46.1) | |
Marital status | ||||
Married/living with partner | 282 (98.3) | 44 (95.7) | 238 (98.8) | 0.390 |
Not married/divorced | 5 (1.7) | 2 (4.4) | 3 (1.2) | |
Body mass index | ||||
Non-obesity (<25 kg/m2) | 245 (85.1) | 38 (82.6) | 207 (85.5) | 0.776 |
Obesity (≥25 kg/m2) | 43 (14.9) | 8 (17.4) | 35 (14.5) | |
Hemoglobin | ||||
Anemia (<12 g/dL) | 263 (91.3) | 39 (84.8) | 224 (92.6) | 0.152 |
Non-anemia (≥12 g/dL) | 25 (8.7) | 7 (15.2) | 18 (7.4) | |
Serum cotinine | ||||
No exposure (<10 ng/ml) | 268 (93.1) | 41 (89.1) | 227 (93.8) | 0.409 |
Passive/Active/Heavy smoking (≥10 ng/ml) | 20 (6.9) | 5 (10.9) | 15 (6.2) | |
Gravidity | ||||
No pregnancies | 7 (2.4) | 1 (2.2) | 6 (2.5) | 0.269 |
1 pregnancy | 58 (20.1) | 9 (19.6) | 49 (20.3) | |
2 pregnancies | 132 (45.8) | 16 (34.8) | 116 (47.9) | |
3 or more pregnancies | 91 (31.6) | 20 (43.5) | 71 (29.3) | |
Oral contraceptive pill use (ever) | ||||
Yes | 220 (76.4) | 39 (84.8) | 181 (74.8) | 0.203 |
No | 68 (23.6) | 7 (15.2) | 61 (25.2) | |
4,000,000
4,000,000