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The Utility of Preoperative Laboratory Testing Before Urogynecologic Surgery.
OBJECTIVES: National guidelines for preoperative laboratory testing are based on limited, low-quality evidence. The role of age as a risk factor for testing is unclear. We sought to compare the prevalence of abnormal preoperative laboratory results in older vs younger urogynecologic surgical patients.
METHODS: In this retrospective cohort study of women undergoing urogynecologic surgery, we compared older (age, ≥65 years) with younger (age, 50-64 years) women. Our primary outcome was the prevalence of an abnormal preoperative laboratory result.
RESULTS: We included 317 women, with 167 (52.7%) in the older cohort (ages, 65-91 years; mean, 73.3 ± 5.6 years) and 150 (47.3%) in the younger cohort (ages, 50-64 years; mean, 57.3 ± 4.1 years). Overall, 18.3% of participants had at least one abnormal preoperative laboratory, with older women more likely to have an abnormal result (28.7% vs 10.7%, P < 0.001). Compared with the younger cohort, older women had higher rates of abnormal hemoglobin (13.8% vs 6.0%, P = 0.02) and creatinine values (10.8% vs 2.7%, P = 0.005), with no significant differences for platelets (3.0% vs 1.3%, P = 0.53), sodium (3.0% vs 0.7%, P = 0.22), or potassium (6.0% vs 3.3%, P = 0.27). After adjusting for potential confounders, older age remained associated with an abnormal preoperative result (odds ratio, 3.6; 95% confidence interval, 1.9-7.1).
CONCLUSIONS: In our sample, women 65 years or older had a greater than 25% chance of having an abnormal preoperative laboratory result and were at higher risk compared with younger women. Age 65 years or greater should be considered as a criterion for preoperative laboratory testing in urogynecologic patients.
METHODS: In this retrospective cohort study of women undergoing urogynecologic surgery, we compared older (age, ≥65 years) with younger (age, 50-64 years) women. Our primary outcome was the prevalence of an abnormal preoperative laboratory result.
RESULTS: We included 317 women, with 167 (52.7%) in the older cohort (ages, 65-91 years; mean, 73.3 ± 5.6 years) and 150 (47.3%) in the younger cohort (ages, 50-64 years; mean, 57.3 ± 4.1 years). Overall, 18.3% of participants had at least one abnormal preoperative laboratory, with older women more likely to have an abnormal result (28.7% vs 10.7%, P < 0.001). Compared with the younger cohort, older women had higher rates of abnormal hemoglobin (13.8% vs 6.0%, P = 0.02) and creatinine values (10.8% vs 2.7%, P = 0.005), with no significant differences for platelets (3.0% vs 1.3%, P = 0.53), sodium (3.0% vs 0.7%, P = 0.22), or potassium (6.0% vs 3.3%, P = 0.27). After adjusting for potential confounders, older age remained associated with an abnormal preoperative result (odds ratio, 3.6; 95% confidence interval, 1.9-7.1).
CONCLUSIONS: In our sample, women 65 years or older had a greater than 25% chance of having an abnormal preoperative laboratory result and were at higher risk compared with younger women. Age 65 years or greater should be considered as a criterion for preoperative laboratory testing in urogynecologic patients.
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