Gynecological emergency ultrasound in daytime and at night: differences that cannot be ignored

Figures & data

Table 1 Basic situation of ultrasound doctors in daytime and at night

Characteristics	Total number of doctors (n=10a)	Daytime (n=7)	Night (n=7)	P-value
Age in years, mean ± SD	33.6±7.4	36.6±8.8	30.6±4.5	0.133b
Number of senior/junior doctors	5/5	5/2	3/4	0.592c

Notes:

a There were 10 doctors totally, among them three worked only in daytime, 3 worked only at night, and other 4 worked both in daytime and at night.

b Independent samples t-test.

c Chi-square test.

Abbreviation: SD, standard deviation.

Table 2 Characteristics of the study population and the main symptoms

Characteristics	Overall study population (n=1,022)	Daytime (n=882)	Night (n=140)	P-value
Age in years, mean ± SD	31.6±7.7	31.8±7.7	30.1±7.9	0.157b
Menolipsis, n (%)	795 (77.8)	684 (77.6)	111 (79.3)	0.743c
Vaginal bleeding, n (%)	550 (53.8)	452 (51.3)	98 (70.0)	0.000c
Lower abdominal pain, n (%)	407 (39.8)	306 (34.7)	101 (72.1)	0.000c
Others,a n (%)	130 (12.7)	108 (12.2)	22 (15.7)	0.274c

Notes:

a Including shock, upper abdominal pain, fever, shivering, nausea, vomiting, pelvic mass, trauma, etc,.

b Independent samples t-test.

c Chi-square test.

Abbreviation: SD, standard deviation.

Figure 1 Contrast chart of disease constituent ratio in daytime and at night.

Table 3 Analysis of disease constituent ratio and coincidence rate of ultrasonic diagnosis in daytime and at night

Disease categories	Number of confirmed cases (constituent ratio, %)		P-value	Number of cases correctly diagnosed by ultrasound (coincidence rate, %)		P-value
	Daytime	Night		Daytime	Night
Ectopic pregnancy (n=230)	165 (18.7)	65 (46.4)	0.000	159 (96.4)	49 (75.4)	0.000
Intrauterine pregnancy (n=315)	299 (33.9)	16 (11.4)	0.000	296 (99.0)	16 (100)	1.000
Abortion and trophoblastic diseases (n=231)	202 (22.9)	29 (20.7)	0.565	198 (98.0)	29 (100)	1.000
Acute pelvic inflammatory disease (n=32)	19 (2.2)	13 (9.3)	0.000	19 (100)	10 (76.9)	0.058
Ovarian tumor (n=36)	29 (3.3)	7 (5.0)	0.321	26 (89.7)	7 (100)	1.000
Uterine and endometrial lesions (n=75)	68 (7.7)	7 (5.0)	0.253	65 (95.6)	7 (100)	1.000
No organic lesion in uterine and adnexa (n=103)	100 (11.3)	3 (2.2)	0.000	100 (100)	3 (100)	N/A
Total (n=1,022)	882 (100)	140 (100)	0.000	863 (97.9)	121 (86.4)	0.000

Abbreviations: SD, standard deviation; N/A, not applicable.