Abstract Background and Aims The classification of peritoneal dialysis (PD) patients based on their peritoneal transport was introduced by Twardowski in 1987, analysing a cohort of 86 PD patients, where gender was not specified. Method Aiming to analyze gender differences in the interpretation of peritoneal transport outcomes, we completed a single-center cross-sectional study of 143 incident patients in PD between 2015 and 2022. We also, assessed differences in their follow-up outcomes until PD cessation (21.2 ± 17 months). Results We analyzed 143 patients (55.3 ± 15.5 years, 92% hypertension, 25.5% diabetic, Charlson index 5.9 ± 2.4 points), corresponding to 85 men (M) and 58 women (W). M were older (M 56.4 ± 15.4 years vs. W 53.7 ± 15.7 years, NS) and associated higher comorbidity (hypertension M 95.8% vs. W 86.4%, p = 0.04 and diabetes M 33.7% vs. W 13.6%, P = 0.007, NS on Charlson index) compared to W. Creatinine transport in W is slower than in M (D/P Cr M 0.73 ± 0.1 vs W 0.69 ± 0.1, p = 0.017), but no differences in glucose transport were observed. Although most patients were classified as medium-high transporters, the percentage of M was significantly higher than W (H 71.1% vs M 52.6%). In our cohort, initial adequacy tests using incremental PD reveal that W have a higher total Kt/v (M 2.2 ± 0.5 vs W 2.8 ± 1.9, p = 0.021) attributed to a higher peritoneal Kt/v (M 0. 95 ± 0.41 vs. W 1.3 ± 1.1, p = 0.035) and renal Kt/v (NS). Despite W presented lower residual renal function (NS) and lower residual diuresis (H 1.5 ± 0.7 L vs. M 1.3 ± 0.6 L) compared with M. There was no gender difference in average duration of PD (M 22.4 vs. W 21.5 months). However, most W ended PD to receive a kidney transplant (46.8%), while most M transitioned to haemodialysis (41.3%). Nineteen patients died during follow-up, with 68.4% being M (NS). Conclusion Differences in D/P Cr and normal distribution curves between M and W suggest significant differences in peritoneal membrane transport. Classical methods of assess PD quality and adequacy may need to be corrected by gender, further studies are needed to determine these differences.