Table 1.
Baseline Patient Characteristics
| Characteristica | Radiofrequency Ablation (n=255) |
Thermal Balloon Ablation (n=200) |
P Values |
|---|---|---|---|
| Age, y | 43.4 (5.5) | 43.0 (5.6) | .44b |
| Body mass index, kg/m2 | 29.4 (7.6) | 29.3 (7.4) | .91b |
| Parity, median (IQR) | 2 (2-3) | 2 (2-3) | .97c |
| Previous cesarean delivery | 45 (18%) | 29 (15%) | .53d |
| Tubal ligation | 86 (34%) | 62 (31%) | .54d |
| Metrorrhagia | 129 (51%) | 88 (44%) | .16d |
| Preprocedure bleeding, d | 9.9 (6.0) | 9.8 (5.8) | .88c |
| Preoperative dysmenorrhea | 13 (5%) | 9 (5%) | .77e |
| Uterine length (uterine sounding), cm | 9.1 (1.2) | 9.0 (1.3) | .74b |
| Retroverted uterus | 14 (6%) | 13 (7%) | .69e |
| Hemoglobin, g/dL | 12.4 (1.4) | 12.0 (1.7) | .003b |
| Ferritin, mcg/L | 20.2 (33.3) | 20.0 (41.9) | .98b |
| Preprocedure US | 202 (79%) | 147 (74%) | .15d |
| Endometrial thickness, mm | 9.2 (6.1) | 9.1 (4.2) | .88c |
| Adenomyosis (US) | 10 (4%) | 10 (5%) | .49e |
| Intracavitary lesions (hysteroscopy) | 85 (33%) | 57 (29%) | .76d |
| Polyps (US and/or hysteroscopy) | 63 (25%) | 45 (23%) | .58d |
| Submucous fibroids (US and/or hysteroscopy) | 25 (10%) | 13 (7%) | .24e |
| Fibroids other than submucous (US) | 52 (20%) | 42 (21%) | .56d |
| Lost to follow-up (no visits after ablation) | 3 (1%) | 0 (0%) | .26e |
Abbreviations: IQR, interquartile range; US, ultrasound.
a
Data are shown as mean (SD) or number of patients (percentage of sample) unless otherwise indicated.
b
Independent sample t-test.
c
Wilcoxon rank sum test.
d
χ2 Test.
e
Fisher exact test.