tetano
Editor, Senior Moderator
Sci Rep
. 2023 Nov 21;13(1):20373.
doi: 10.1038/s41598-023-47756-8. Survey on chest CT findings in COVID-19 patients in Okinawa, Japan: differences between the delta and omicron variants
Nanae Tsuchiya[SUP] 1 [/SUP], Eri Yonamine[SUP] 2 [/SUP], Shoko Iraha[SUP] 3 [/SUP], Makoto Takara[SUP] 4 [/SUP], Yasuji Oshiro[SUP] 5 [/SUP], Miyara Tetsuhiro[SUP] 6 [/SUP], Sadayuki Murayama[SUP] 6 [/SUP], Ryo Kinoshita[SUP] 7 [/SUP], Masaki Sato[SUP] 2 [/SUP], Yukiko Nishikuramori[SUP] 8 [/SUP], Hiroaki Takara[SUP] 9 [/SUP], Tamaki Akamine[SUP] 10 [/SUP], Hikaru Morita[SUP] 11 [/SUP], Takashi Matayoshi[SUP] 12 [/SUP], Yuma Chinen[SUP] 2 [/SUP], Akihiro Nishie[SUP] 2 [/SUP]
Affiliations
To investigate the frequency of pneumonia and chest computed tomography (CT) findings in patients with coronavirus disease 2019 (COVID-19) during the fifth Delta variant-predominant and sixth Omicron variant-predominant waves of the COVID-19 pandemic in Okinawa, Japan. A survey on chest CT examinations for patients with COVID-19 was conducted byhospitals with board-certified radiologists who provided treatment for COVID-19 pneumonia in Okinawa Prefecture. Data from 11 facilities were investigated. Indications for chest CT; number of COVID-19 patients undergoing chest CT; number of patients with late-onset pneumonia, tracheal intubation, and number of deaths; and COVID-19 Reporting and Data System classifications of initial chest CT scans were compared by the chi-squared test between the two pandemic waves (Delta vs. Omicron variants). A total of 1944 CT scans were performed during the fifth wave, and 1178 were performed during the sixth wave. CT implementation rates, which were the number of patients with COVID-19 undergoing CT examinations divided by the total number of COVID-19 cases in Okinawa Prefecture during the waves, were 7.1% for the fifth wave and 2.1% for the sixth wave. The rates of tracheal intubation and mortality were higher in the fifth wave. Differences between the distributions of the CO-RADS classifications were statistically significant for the fifth and sixth waves (p < 0.0001). In the fifth wave, CO-RADS 5 (typical of COVID-19) was most common (65%); in the sixth wave, CO-RADS 1 (no findings of pneumonia) was most common (50%). The finding of "typical for other infection but not COVID-19" was more frequent in the sixth than in the fifth wave (13.6% vs. 1.9%, respectively). The frequencies of pneumonia and typical CT findings were higher in the fifth Delta variant-predominant wave, and nontypical CT findings were more frequent in the sixth Omicron variant-predominant wave of the COVID-19 pandemic in Okinawa, Japan.
. 2023 Nov 21;13(1):20373.
doi: 10.1038/s41598-023-47756-8. Survey on chest CT findings in COVID-19 patients in Okinawa, Japan: differences between the delta and omicron variants
Nanae Tsuchiya[SUP] 1 [/SUP], Eri Yonamine[SUP] 2 [/SUP], Shoko Iraha[SUP] 3 [/SUP], Makoto Takara[SUP] 4 [/SUP], Yasuji Oshiro[SUP] 5 [/SUP], Miyara Tetsuhiro[SUP] 6 [/SUP], Sadayuki Murayama[SUP] 6 [/SUP], Ryo Kinoshita[SUP] 7 [/SUP], Masaki Sato[SUP] 2 [/SUP], Yukiko Nishikuramori[SUP] 8 [/SUP], Hiroaki Takara[SUP] 9 [/SUP], Tamaki Akamine[SUP] 10 [/SUP], Hikaru Morita[SUP] 11 [/SUP], Takashi Matayoshi[SUP] 12 [/SUP], Yuma Chinen[SUP] 2 [/SUP], Akihiro Nishie[SUP] 2 [/SUP]
Affiliations
- PMID: 37990038
- DOI: 10.1038/s41598-023-47756-8
To investigate the frequency of pneumonia and chest computed tomography (CT) findings in patients with coronavirus disease 2019 (COVID-19) during the fifth Delta variant-predominant and sixth Omicron variant-predominant waves of the COVID-19 pandemic in Okinawa, Japan. A survey on chest CT examinations for patients with COVID-19 was conducted byhospitals with board-certified radiologists who provided treatment for COVID-19 pneumonia in Okinawa Prefecture. Data from 11 facilities were investigated. Indications for chest CT; number of COVID-19 patients undergoing chest CT; number of patients with late-onset pneumonia, tracheal intubation, and number of deaths; and COVID-19 Reporting and Data System classifications of initial chest CT scans were compared by the chi-squared test between the two pandemic waves (Delta vs. Omicron variants). A total of 1944 CT scans were performed during the fifth wave, and 1178 were performed during the sixth wave. CT implementation rates, which were the number of patients with COVID-19 undergoing CT examinations divided by the total number of COVID-19 cases in Okinawa Prefecture during the waves, were 7.1% for the fifth wave and 2.1% for the sixth wave. The rates of tracheal intubation and mortality were higher in the fifth wave. Differences between the distributions of the CO-RADS classifications were statistically significant for the fifth and sixth waves (p < 0.0001). In the fifth wave, CO-RADS 5 (typical of COVID-19) was most common (65%); in the sixth wave, CO-RADS 1 (no findings of pneumonia) was most common (50%). The finding of "typical for other infection but not COVID-19" was more frequent in the sixth than in the fifth wave (13.6% vs. 1.9%, respectively). The frequencies of pneumonia and typical CT findings were higher in the fifth Delta variant-predominant wave, and nontypical CT findings were more frequent in the sixth Omicron variant-predominant wave of the COVID-19 pandemic in Okinawa, Japan.