Table 2.
Baseline Patient Characteristics of Women who Underwent Thermal Balloon Ablation Before and After Introduction of Bipolar Radiofrequency Ablation in 2003
| Characteristica | Treatment from 1998-2002 (n=143) |
Treatment from 2003-2005 (n=57) |
P Values |
|---|---|---|---|
| Age, y | 42.7 (5.8) | 43.7 (5.1) | .28b |
| Body mass index, kg/m2 | 29.6 (7.5) | 28.7 (7.3) | .43b |
| Parity, median (IQR) | 2 (2-3) | 2 (2-3) | .34c |
| Previous cesarean delivery | 21 (16%) | 8 (14%) | .89d |
| Tubal ligation | 48 (34%) | 14 (25%) | .21d |
| Metrorrhagia | 66 (46%) | 22 (39%) | .33d |
| Preprocedure bleeding, d | 9.8 (5.9) | 9.8 (5.6) | .98c |
| Preoperative dysmenorrhea | 8 (6%) | 1 (2%) | .45e |
| Uterine length (uterine sounding), cm | 9.1 (1.2) | 9.0 (1.5) | .66b |
| Retroverted uterus | 8 (6%) | 5 (9%) | .41e |
| Hemoglobin, g/dL | 12.0 (1.6) | 12.0 (2.1) | .81b |
| Ferritin, mcg/L | 24.0 (46.8) | 5.9 (3.8) | .02b |
| Preprocedure US | 99 (69%) | 48 (84%) | .03d |
| Endometrial thickness, mm | 8.6 (4.4) | 10.0 (3.6) | .09c |
| Adenomyosis (US) | 5 (4%) | 5 (9%) | .30e |
| Intracavitary lesions (hysteroscopy) | 40 (28%) | 17 (30%) | .22d |
| Polyps (US and/or hyeroscopy) | 33 (23%) | 45 (21%) | .76d |
| Submucous fibroids (US and/or hysteroscopy) | 5 (3%) | 8 (14%) | .01e |
| Fibroids other than submucous (US) | 26 (18%) | 16 (28%) | .38d |
| Lost to follow-up (no visits after ablation) | 0 (0%) | 0 (0%) | … |
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.