Table 2. Hysteroscopic findings
  All
(n=1141)
TVS positive
(n=180)
TVS negative
(n=961)
p-value
Any alteration 351 (30.7%) 86 (47.8%) 265 (27.6%) 0.000
Endometrial Polyp 170 (17.9%) 44 (24.4%) 126 (13.1%) 0.000
Submucous Leiomyoma 44 (3.9%) 20 (11.1%) 24 (2.5%) 0.000
Uterine Synechiae 39 (3.4%) 9 (5.0%) 30 (3.1%) 0.260
Uterine Malformation 53 (4.6%) 16 (8.9%) 37 (3.9%) 0.006
Suspected Endometritis 42 (3.7%) 1 (0.6%) 41 (4.3%) 0.009
Endometrial "thickening" 42 (3.7%) 9 (5.0%) 33 (3.4%) 0.285
Other 15 (1.3%) 1 (0.6%) 14 (1.4%) 0.490
The sum of all alterations is higher than the number of hysteroscopies with “any alteration” because some patients had more than one type of lesion.
p-values refer to the comparison between TVS positive and TVS negative groups (Chi-square or Fisher’s exact test, as appropriate).