Value of endometrial peristalsis analysis technique in detecting and analyzing endometrial peristalsis features

Table 1 The basic information of the patients and the comparison in patients with endometrial peristalsis, no endometrial peristalsis and endometrial peristalsis analysis done unsuccessfully

	Case numbers	Age (year)	History of induced abortion			Menstrual cycle			Uterine position		Uterine longitudinal diameter (mm)	Endometrial thickness (mm)	Endometrial grade
			0	1	≥ 2	Proliferate phase	Secretory phase	Menopause	Anterior	Posterior			A	B	C
EmPA done unsuccessfully	9	35.67 ± 4.69	5	2	2	4	5	0	8	1	58.22 ± 4.09	9.41 ± 1.80	1	2	6
With EmP shown on EmPA	115	33.70 ± 7.78	54	35	26	68	44	3	70	45	52.43 ± 7.08	6.53 ± 2.52	52	39	24
No EmP shown on EmPA	21	39.71 ± 13.95	7	3	11	14	1	6	12	9	43.38 ± 9.37	4.72 ± 2.87	9	3	9
t/χ²		2.822		29.201		39.629			2.946		5.103	2.957	27.117
P value		0.006	< 0.001			< 0.001			0.244		< 0.001	0.004	< 0.001

P showed the statistical differences between patients with EmP shown on EmPA and with no EmP shown on EmPA.

EmP: Endometrial peristalsis; EmPA: Endometrial peristalsis analysis.

Table 2 The comparison of endometrial peristalsis results in 50 patients by both endometrial peristalsis analysis and naked eyes analysis

		EmPA (n = 50)
		No EmP (9)	With EmP (38)	EmPA done unsuccessfully (3)
Naked eyes analysis of a senior radiologist (n = 50)	No EmP (8)	4	3	1
	With EmP (42)	5	35	2
	χ2	7.569
	P value	0.016

EmP: Endometrial peristalsis; EmPA: Endometrial peristalsis analysis.

Table 3 Average parameters of endometrial peristalsis analysis and their relations with clinical and ultrasound parameters

		Transfer direction			Peristalsis intensity	Transfer time (sec)	Transfer distance (mm)	Transfer velocity (mm/second)	Peristalsis frequency (/minute)
		CF	FC	OP
Menstrual cycle	Proliferate phase (n = 68)	37	24	7	21.842 ± 8.154	6.444 ± 4.067	13.474 ± 9.033	2.494 ± 1.120	2.125 ± 0.975
	Secretory phase (n = 44)	30	9	5	26.308 ± 9.866	5.804 ± 3.662	12.529 ± 6.054	2.743 ± 1.205	2.330 ± 1.120
	t/χ²	2.896			2.621	0.845	0.610	1.113	1.022
	P value	0.256			0.010	0.400	0.543	0.268	0.309
Uterine position	Anteverted (70)	43	21	6	25.280 ± 8.769	6.165 ± 3.974	11.567 ± 6.124	2.404 ± 1.007	2.164 ± 0.984
	Retroverted (45)	26	13	6	20.574 ± 8.786	6.080 ± 3.790	15.263 ± 9.737	2.903 ± 1.298	2.244 ± 1.161
	t/χ²	0.740			2.807	0.115	2.501	2.311	0.397
	P value	0.718			0.006	0.909	0.014	0.023	0.692
History of induced abortion	0 (54)	30	18	6	23.709 ± 8.808	6.234 ± 3.621	13.606 ± 8.665	2.644 ± 1.202	2.472 ± 1.066
	1 (35)	22	9	4	26.130 ± 7.802	5.716 ± 3.598	11.689 ± 6.646	2.480 ± 1.060	2.057 ± 0.914
	≥ 2 (26)	17	7	2	19.255 ± 9.828a	6.480 ± 4.803	13.564 ± 7.910	2.667 ± 1.192	1.808 ± 1.078b
	F/χ²	1.093			4.642	0.320	0.702	0.269	4.149
	P value	0.915			0.012	0.727	0.498	0.765	0.018
Endometrial grade	A (52)	34	12	6	23.998 ± 9.132	6.150 ± 3.767	11.886 ± 5.656	2.428 ± 0.988	2.327 ± 0.949
	B (39)	21	15	3	24.173 ± 9.137	6.411 ± 3.907	15.030 ± 10.745	2.754 ± 1.206	2.359 ± 1.063
	C (24)	14	7	3	21.035 ± 8.615	5.637 ± 4.219	12.178 ± 6.162	2.719 ± 1.370	1.646 ± 1.107c
	F/χ²	2.832			1.079	0.292	1.961	0.057	4.394
	P value	0.595			0.343	0.747	0.146	0.351	0.015
Age	≤ 35 year (80)	50	20	10	23.364 ± 9.387	5.734 ± 3.353	1.249 ± 0.795	2.583 ± 1.130	2.250 ± 1.049
	> 35 year (35)	19	14	2	23.611 ± 8.305	7.041 ± 4.826	1.422 ± 0.779	2.637 ± 1.215	2.071 ± 1.065
	t/χ²	2.996			0.134	1.455	1.079	0.233	0.836
	P value	0.221			0.893	0.152	0.283	0.816	0.405
Age	r	/			0.068	0.079	0.043	0.008	0.136
	P value	/			0.471	0.400	0.652	0.932	0.146
Uterine longitudinal diameter	r	/			0.042	0.036	0.096	0.100	0.216
	P value	/			0.659	0.703	0.309	0.286	0.020
Uterine endometrial thickness	r	/			0.316	0.069	0.084	0.107	0.293
	P value	/			0.001	0.436	0.370	0.254	0.001

^aP < 0.05 vs no history of induced abortion or 1 time of induced abortion.

^bP < 0.05 vs no history of induced abortion.

^cP < 0.05 vs endometrial grade as A or B.

FC: Fundus to cervix; CF: From cervix to fundus; OP: Opposing.

Table 4 Highest parameters of endometrial peristalsis analysis and their relations with clinical and ultrasound parameters

		Transfer direction		Peristalsis intensity	Transfer time (second)	Transfer distance (mm)	Transfer velocity (mm/second)
		CF	FC
Menstrual cycle	Proliferate phase (n = 68)	39	28	25.857 ± 10.307	6.255 ± 4.722	12.478 ± 7.429	2.643 ± 1.790
	Secretory phase (n = 44)	30	13	32.180 ± 12.162	5.793 ± 3.914	13.177 ± 6.899	3.113 ± 2.213
	t/χ²	1.497		2.953	0.539	0.500	1.235
	P value	0.234		0.004	0.591	0.618	0.219
Uterine position	Anteverted (70)	43	27	30.151 ± 11.023	6.074 ± 4.363	11.447 ± 6.888	2.427 ± 1.516
	Retroverted (45)	29	14	25.043 ± 11.679	5.868 ± 4.450	14.513 ± 7.210	3.462 ± 2.365
	t/χ²	0.417		2.369	0.246	2.288	2.610
	P value	0.552		0.020	0.806	0.024	0.011
History of induced abortion	0 (54)	32	20	28.978 ± 11.596	5.816 ± 4.038	12.441 ± 6.344	2.898 ± 2.111
	1 (35)	23	12	31.406 ± 9.595	5.755 ± 3.586	11.866 ± 6.780	2.711 ± 1.909
	≥ 2 (26)	17	18	22.058 ± 11.783a	6.684 ± 5.894	14.127 ± 9.038	2.857 ± 1.712
	F/χ²	2.365		5.601	0.416	0.787	0.099
	P value	0.321		0.005	0.661	0.458	0.906
Endometrial grade	A (52)	34	18	28.768 ± 11.190	6.217 ± 4.455	11.746 ± 6.254	2.349 ± 1.266
	B (39)	21	18	29.634 ± 11.939	6.195 ± 4.555	13.654 ± 8.558	2.952 ± 2.058
	C (24)	17	5	24.407 ± 11.144	5.181 ± 3.984	12.963 ± 6.447	3.683 ± 2.648b
	F/χ²	3.455		1.690	0.518	0.822	4.171
	P value	0.185		0.189	0.597	0.442	0.018
Age, year	≤ 35 (80)	52	27	28.323 ± 11.848	5.613 ± 3.752	11.800 ± 6.092	2.778 ± 1.974
	> 35 (35)	20	14	27.761 ± 10.851	6.862 ± 5.519	14.583 ± 8.908	2.954 ± 1.920
	t/χ²	0.504		0.240	1.221	1.684	0.442
	P value	0.526		0.811	0.228	0.099	0.659
Age	r	/		0.139	0.056	0.063	0.066
	P value	/		0.139	0.552	0.500	0.483
Uterine longitudinal diameter	r	/		0.069	0.044	0.080	0.170
	P value	/		0.462	0.644	0.393	0.069
Uterine endometrial thickness	r	/		0.317	0.083	0.152	0.035
	P value	/		0.001	0.376	0.104	0.710

^aP < 0.05 vs no history of induced abortion or 1 time of induced abortion.

^bP < 0.05 vs endometrial grade as A.

FC: Fundus to cervix; CF: From cervix to fundus.