Results
A series of COVID-19 tests, including SARS-CoV-2 NAT of throat swabs, chest CT scan and a SARS-CoV-2-specific serological test, were conducted on a total of 1,054 obstetrics and gynecology outpatients. Three cases of COVID-19 discovered in the recovery period (2 cases of NAT positive of SARS-CoV-2, 1 case of IgM and IgG positive of SARS-CoV-2) were excluded because of the concealment of the infection history, and 1,051 patients were included in the study. The median age was 38 years old (49-30). A total of 398 patients were admitted to the hospital for further treatment, 96 patients underwent outpatient surgery, and 557 persons required health check-ups due to re-employment and hospital escort requirements. The test result statistics for all patients are presented in Table I. The SARS-CoV-2 nucleic acid test was negative in all 1051 patients. Nine (9/1051, 0.856%) patients had IgM+ (and IgG+), which provided a hint of possible asymptomatic infection. The IgG+ individuals (33/1051, 3.140%) with no history of COVID-19 probably had recovered asymptomatic SARS-CoV-2 infections.
Seventy-six cases were diagnosed with abnormal uterine bleeding-related disease (excluding endometrial malignancy), and 5 of these patients were 2019-nCoV antibody positive (see Table 1); the positive rate was 6.579%, which is greater than the average positive rate of 3.974%, and the positive rate among patients with other diseases (2.770%, 3.604%, 4.453%), indicating that such patients may be more susceptible to SARS-CoV-2. Of 325 patients who were pregnant, the 2019-nCoV antibody positive rate was 2.770% (9/325), and the IgM positive rate was 0.615% (2/325), which was the lowest in the classification of diseases (see Table 1).
No signs of viral pneumonia were found on chest CT scans in the 1051 patients. In 9 patients who were IgM+ (and IgG+), only one patient had a chest CT scan that indicated ground glass nodules in the right lower lobe (see Supporting information). All IgM-positive patients were tested at least twice, and no nucleic acid positivity was found; one case of IgM positivity turned negative one week later (see Supporting information). All IgM-positive patients had no fever and no symptoms of COVID-19, and no SARS-CoV-2 infection was found in the 9 patients’ families. None of the patients admitted to the hospital experienced SARS-CoV-2 infections during hospitalization.