Table 1. Characteristics of the study participants
  All
(n=1141)		 TVS positive
(n=180)		 TVS negative
(n=961)		 p-value
Age (years) 35.4±4.7 36.1±4.9 35.3±4.7 0.031
Length of infertility (years) 7.7±4.2 7.5±4.7 7.7±4.1 0.611
Menstrual cycle day 8.7±1.9 8.7±2.2 8.7±1.9 0.221
Infertility
Primary
Secondary		 613/901 (68%)
288/901 (32%)		 85/134 (63%)
49/134 (37%)		 528/767 (69%)
239/767 (31%)		 0.255
Main Cause*
Male factor
Tubal
Endometriosis
PCOS
Unexplained
Other		 290 (25%)
97 (9%)
90 (8%)
30 (3%)
627 (55%)
7 (1%)		 28 (16%)
11 (6%)
12 (7%)
1 (1%)
126 (70%)
2 (1%)		 262 (27%)
86 (9%)
78 (8%)
29 (3%)
501 (52%)
5 (1%)		 0.000
Continuous variables are shown as mean±standard variation. p-values refer to the comparison between TVS positive and TVS negative groups (Mann-Whitney test for continuous variables and Chi-square test for categorical variables).
* according to annotations in the hysteroscopy report.