Measuring the space between vagina and rectum as it relates to rectocele

Table 1 Data on the space between the vagina and the rectum at three levels (mm)

n	Group 1 (upper 1/3 level)	Group 2 (middle level)	Group 3 (lower 1/3 level)
n1	3.61	4.51	9.93
n2	4.02	4.87	10.14
n3	3.34	4.92	10.26
n4	4.31	4.38	10.38
n5	3.29	4.65	9.87
n6	4.04	4.73	9.66
n7	3.83	4.89	9.54
n8	3.91	4.99	10.23
n9	3.96	5.08	9.66
n10	4.26	4.16	9.78
n11	3.73	4.26	9.88
n12	4.26	4.34	9.46
n13	2.96	4.67	9.83
n14	4.15	4.54	10.23
n15	3.86	4.78	10.49
n16	4.11	4.96	10.57
n17	4.29	5.21	11.04
n18	4.16	4.17	10.87
n19	3.97	4.49	9.38
n20	3.86	4.55	9.96