Obesity in total laparoscopic hysterectomy for early stage endometrial cancer: health gain and inpatient resource use.

OBJECTIVE: To explore relationships between BMI (morbid/severe obesity; BMI ≥ 35 kg/m2 vs. non morbid/severe obesity; BMI < 35 kg/m2), postoperative health gain and hospital resource use for women who receive a Total Laparoscopic Hysterectomy (TLH) for early stage endometrial cancer. DESIGN: Secondary analysis of RCT data (LACE Study; Total Abdominal Hysterectomy vs. TLH). SETTING: 20 tertiary gynaecological cancer centres in Australia, New Zealand and Hong Kong. POPULATION: About 404 women who received TLH to treat early stage endometrial cancer. METHODS: For women with BMI < 35 vs. BMI ≥ 35 kg/m2, we compared (i) postoperative health gain, using utility scores derived from responses to the EQ-5D-3L health-related quality of life instrument, and (ii) inpatient hospital resource use, using adverse events, surgery duration and postoperative length of stay as indicators, to 6 months post-surgery. MAIN OUTCOME MEASURES: Health gain, resource use. RESULTS: Mean postoperative health gain was 0.07 units, and did not vary by BMI. Women with a BMI ≥ 35 had an increased rate of severe postoperative AEs (BMI ≥ 35 RR = 1.95, P = 0.02), and the surgery took on average 9.6 min longer (BMI < 35 kg/m2 122.5 min 95% CI 117.4-127.8; BMI ≥ 35 kg/m2 132.1 min 95% CI 126.3-138.2; P = 0.02). CONCLUSION: While postoperative health gain for women with BMI ≥ 35 was similar to that of women with lower BMI, the gain was achieved at the expense of greater resource use. Further work could definitively quantify the excess cost of TLH for obese patients with endometrial cancer, and investigate the potential for non-surgical treatment options, at least for those women at high risk of postoperative AEs.