Table 2.
Characteristics of Study Population According to Group
| Characteristic | Recent OC users (n = 70) | Controls (n = 70) | Total (n = 140) | p value |
|---|---|---|---|---|
| Demographics | ||||
| Age, mean ± SD | 26.2 ± 3.2 | 26.6 ± 3.3 | 26.4 ± 3.2 | 0.48 |
| n (%) | n (%) | n (%) | ||
| Previously had a live birth | 7 (10.0) | 7 (10.0) | 14 (10.0) | 1.00 |
| Race | ||||
| White | 68 (97.1) | 67 (95.7) | 135 (96.4) | 1.00 |
| Other | 2 (2.9) | 3 (4.3) | 5 (3.6) | |
| Marital status | ||||
| Single/divorced | 4 (5.7) | 13 (18.6) | 17 (12.1) | <0.0001 |
| Engaged | 10 (14.3) | 35 (50.0) | 45 (32.1) | |
| Married | 56 (80.0) | 22 (31.4) | 78 (55.7) | |
| Education | ||||
| High school/vocational | 7 (10.0) | 13 (18.6) | 20 (14.3) | 0.14 |
| Some college | 16 (22.9) | 7 (10.0) | 23 (16.4) | |
| Completed college | 36 (51.4) | 39 (55.7) | 75 (53.6) | |
| Graduate school | 11 (15.7) | 11 (15.7) | 22 (15.7) | |
| Employed | 62 (88.6) | 59 (84.3) | 121 (86.4) | 0.46 |
| Income | ||||
| <40,000 | 25 (35.7) | 40 (57.1) | 65 (46.4) | 0.01 |
| ≥40,000 | 45 (64.3) | 30 (42.9) | 75 (53.6) | |
| Center | ||||
| Georgia | 13 (18.6) | 10 (14.3) | 23 (16.4) | 0.79 |
| Missouri | 41 (58.6) | 43 (61.4) | 84 (60.0) | |
| Wisconsin | 16 (22.9) | 17 (24.3) | 33 (23.6) | |
| Medications | ||||
| Antibiotics | 3 (4.3) | 13 (18.6) | 16 (11.4) | 0.01 |
| Antihistamines | 15 (21.4) | 11 (15.7) | 27 (19.3) | 0.38 |
| Vitamins | 25 (35.7) | 20 (28.6) | 45 (32.1) | 0.37 |
| Expectorants | 2 (2.9) | 2 (2.9) | 4 (2.9) | 1.00 |
| Hormones | 1 (1.4) | 4 (5.7) | 5 (3.6) | 0.37 |
| Menstrual function for first cycle after starting CrMSa | Mean ± SD | Mean ± SD | Mean ± SD | |
| Length of luteal phase (days) | 11.1 (3.0) | 11.5 (2.6) | 11.3 (2.8) | 0.39 |
| Length of menstrual flow (days) | 5.5 (1.5) | 6.2 (1.2) | 5.9 (1.4) | 0.004 |
| Length of cycle (days) | 31.5 (11.1) | 29.8 (6.9) | 30.6 (9.2) | 0.32 |
| Estimated day of ovulation | 20.4 (11.4) | 18.5 (6.7) | 19.4 (9.4) | 0.25 |
| Menstrual flow score | 4.9 (2.1) | 6.2 (1.4) | 5.59 (1.9) | 0.0001 |
| Cervical mucus score | 7.3 (4.0) | 9.0 (3.5) | 8.12 (3.8) | 0.01 |
a
Due to four matched pairs without a cycle 1, total number of women analyzed was 132.
CrMS, Creighton Model FertilityCare System; OC, oral contraceptives; SD, standard deviation.