. 2016 Oct 3;67(3):208–212. doi: 10.1007/s13224-016-0931-x

Table 2.

Association of ultrasonographic and laparoscopic findings with staging of endometriosis

Laparoscopic findings	Stage I (N = 183)		Stage II (N = 49)		Stage III (N = 23)		Stage 4 (N = 21)		P value
Laparoscopic findings	N (%)	OR	N (%)	OR	N (%)	OR	N (%)	OR	P value
Endometrioma on ultrasonography	0 (0 %)	1.00	7 (14.29 %)	N/A	10 (43.48 %)	N/A	14 (66.67 %)	N/A	<0.01^a
Endometrioma on laparoscopy	0 (0 %)	1.00	3 (6.12 %)	N/A	11 (47.83 %)	N/A	8 (38.10 %)	N/A	<0.01^a

OR odds ratios, NS non-significant difference between these groups

P < 0.05 considered to be statistically significant difference

^aSignificant difference between these groups