A comparison between type 3 excision of the transformation zone by straight wire excision of the transformation zone (SWETZ) and large loop excision of the transformation zone (LLETZ): a randomized study

Table 2 Comparison between the groups (SWETZ × LLETZ-cone): surgical outcomes (IFF/Fiocruz - 2008–2011)

	SWETZ	%, range or SD^*	LLETZ-cone	%, range or SD^*	ARR (95% CI)	RR (95% CI)	p-value
N	78	100	76	100	-	-	-
Blood loss (ml)
<20	74	94.9	76	100	-	-
20-100	4	5.1	0	0	−5.1 (−10.0 – -0.2)	-	0.1^†
Number of segments removed
1	77	100	59	78.7	19.8 (10.3-29.3)	-	-
>1	0	0	16	21.3	-	-	<0,01^‡
No data	1	-	1	-		-	-
Surgery time - minutes (median)	20	8-60	17	9-32	-	-	<0,01^§
≤18 min	33	42.9	44	60.3	-	-	-
>18 min	44	57.1	29	39.7	−16.3 (−32,2 – -0.4)	1.44 (1.02-2.03)
No data	1	-	5	-	-	-	-
Geometric ambition - mm (average)^¶	30.92	6.31	30.54	6.15	-	-	0,7^\|\|
Geometric ambition difference - mm (average)^¶**	10.19	5.7	10.62	5.5	-	-	0,7^\|\|
Anesthetic volume – ml	8.26	1.95	8.04	1.8	-	-	0,5^\|\|
No data	11	-	15	-	-	-	-
Complications	2^‡‡	2.6	2^††	3	0.1 (−5.0-5.1)	0.97 (0.14-6.74)	1^†

^*Cases with no data were excluded.
^† Fisher's Exact test.
^‡Chi-square.
^§Mann–Whitney test.
^||Student's t-test.
^¶The ones unfilled of ambition or without histological measure were excluded.
^**Difference between the desired extension (endo + ecto) and what was effectively measured in the specimen.
^††Opening of the vaginal mucosa and the need for anesthetic supplementation.
^‡‡Opening of the lateral vaginal cul-de-sac with vascular injury, requiring total hysterectomy and need for general anesthesia.

ISSN: 1472-6874