Table 9.

Unadjusted and adjusted analysis classifying centres by median number of nodes harvested, with the Cox model for overall survival and recurrence-free survival

	Overall survival	Recurrence-free survival
Centres with median LN count <10
Unadjusted (n=489)	0·81 (0·50–1·31)	1·01 (0·67–1·54)
Adjusted* (n=481)	0·54 (0·31–0·95)	0·72 (0·45–1·16)
Centres with median LN count 10–14
Unadjusted (n=314)	1·40 (0·74–2·64)	1·72 (1·00–2·96)
Adjusted* (n=307)	1·39 (0·67–2·90)	1·81 (0·99–3·27)
Centres with median LN count ≥15
Unadjusted (n=553)	1·57 (1·00–2·45)	1·71 (1·14–2·56)
Adjusted* (n=536)	1·37 (0·83–2·26)	1·50 (0·95–2·37)

Data are hazard ratio (95% CI). LN=lymph node.

^*Adjusted by covariates (with imputation by mean for unknown baseline) for age (continuous), WHO performance status (0, 1, 2, 3, or 4), weeks between diagnosis and randomisation (≤6 weeks vs >6 weeks), surgical technique intended (open vs laparoscopic), type of incision (vertical vs Pfannenstiel vs other transverse), extent of tumour (confined vs spread), histology (endometrioid/adenocarcinoma vs other), depth of invasion (inner half vs endometrium, outer half vs endometrium), and differentiation (grade 1, grade 2, grade 3).