Table 1 Studies reporting proportion of patients with COVID-19 with gastrointestinal symptoms

From: Potential intestinal infection and faecal–oral transmission of SARS-CoV-2

Study

Region

Time

Total number of patients

Gastrointestinal symptom

Point at which symptoms were reported

Gastrointestinal symptoms and disease severity

Studies in adults

Lin et al.25

Zhuhai, China

17 Jan to 15 Feb 2020

95

Diarrhoea 5.3%; nausea 3.2%; anorexia 5.3%; acid reflux 1.1%

On admission

No statistically significant difference in the clinical outcomes (remained in hospital, discharged or died)

Diarrhoea 18.9%; nausea 14.7%; vomiting 4.2%; anorexia 12.6%; acid reflux 1.1%; epigastric discomfort 2.1%

During hospitalization

Papa et al.27,a

Rome, Italy

15 Mar to 14 Apr 2020

34

Any gastrointestinal symptoms 8.8%

On admission

Gastrointestinal symptoms associated with reduced mortality

Any gastrointestinal symptoms 32.3%

During hospitalization

Jin et al.23

Zhejiang, China

17 Jan to 8 Feb 2020

651

Diarrhoea 8.6%; vomiting 2.15%; nausea 2.0%

On admission

Gastrointestinal symptoms associated with severe disease

Zhou et al.16

Wuhan, China

29 Dec 2019 to 31 Jan 2020

191

Diarrhoea 5%; nausea or vomiting 4%

On admission

No statistically significant difference in mortality

Chen et al.24,a

Baltimore, USA

9 Mar to 15 Apr 2020

101

Diarrhoea 50%; nausea 30%; vomiting 14%; abdominal pain 26%; anorexia 53%; haematochezia 1%

On admission

No correlation between gastrointestinal symptoms and increased hospitalization rate or ICU care needs

Ferm et al.17

New York, USA

14 Mar to 1 Apr 2020

892

Diarrhoea 9.8%; nausea 16.6%; vomiting 10.2%; loss of taste 2.4%; loss of appetite 11.8%; abdominal pain 7.8%

On admission

No difference in ICU admission, length of stay, or mortality

Remes-Troche et al.20

Veracruz, Mexico

1 Apr to 5 May 2020

112

Diarrhoea 7.8%; vomiting 7.1%; abdominal pain 9.8%

On admission

No statistically significant difference in disease severity

Redd et al.22

Massachusetts, USA

Until 2 Apr 2020

318

Diarrhoea 33.7%; nausea 26.4%; vomiting 15.4%; abdominal pain 14.5%; anorexia 34.8%; constipation 0.94%; melena 0.63%; reflux 0.63%; dysphagia 0.31%; odynophagia 0.31%; haematochezia 0.31%

During hospitalization

No correlation between gastrointestinal symptoms and disease severity

Wan et al.28

China

19 Jan to 6 Mar 2020

232

Diarrhoea 21%; abdominal pain 1%; bloody stool 4%

During hospitalization

Gastrointestinal symptoms associated with severe symptoms of pneumonia

Díaz et al.18

Chile

Until 11 Apr 2020

7,016

Diarrhoea 7.3%; abdominal pain 3.7%

No distinction made

Gastrointestinal symptoms associated with a higher risk of hospitalization

Cholankeril et al.29

California, USA

4 Mar to 24 Mar 2020

116

Diarrhoea 10.3%; nausea and/or vomiting 10.3%; abdominal pain 8.8%; loss of appetite 25.3%

No distinction made

No correlation between gastrointestinal symptoms and disease severity

Hajifathalian et al.21

New York, USA

4 Mar to 9 Apr 2020

1,059

Diarrhoea 22%; abdominal pain 7%

No distinction made

Gastrointestinal symptoms associated with lower rates of death and ICU admission

Studies on paediatric patients

Xu et al.79

Guangdong, China

Until 20 Feb 2020

10

Diarrhoea 30%; vomiting 0

On admission

NA

Cai et al.81

China

Jan 19 to 3 Feb 2020

10

Diarrhoea 0%

During hospitalization

NA

Lu et al.170

Wuhan, China

28 Jan to 26 Feb 2020

171

Diarrhoea 8.8%; vomiting 6.4%

No distinction made

NA

Fakiri et al.171

Marrakesh, Morocco

2 Mar to 1 Apr 2020

74

Diarrhoea 5.4%

No distinction made

NA

de Ceano-Vivas et al.172

Madrid, Spain

11 Mar to 9 Apr 2020

58

Diarrhoea 12.1%; vomiting 15.5%

No distinction made

NA

Mahmoudi et al.173

Tehran, Iran

7 Mar to 30 Mar 2020

35

Diarrhoea 26%; vomiting 29%; abdominal pain 11%

No distinction made

NA

CDC COVID-19 Response Team174

USA

12 Feb to 2 Apr 2020

291

Diarrhoea 13%; nausea and/or vomiting 11%; abdominal pain 5.8%

No distinction made

NA

Parri et al.175

Italy

3 Mar to 27 Mar 2020

100

Diarrhoea 9%; nausea or vomiting 10%

No distinction made

NA

  1. Table 1 contains selected studies that take sample size, region, symptom collection time point (on admission or during hospitalization) and research methods (prospective or retrospective) into consideration. In detail, studies on adult patients that clarified whether the gastrointestinal symptoms were collected before or after admission and with a sample size >100 were included; the two studies that distinguish the symptoms on admission and during hospitalization are placed but samples <100 are placed at the top of the table. Two studies in Chile and California, with a sample size of >100 but missing the symptom collection time point, were included owing to the few studies in these regions. One New York study with a large sample size was also included. The number of paediatric studies containing gastrointestinal symptoms are limited; studies in different regions with symptom collection time point or a sample size >35 were included. CDC, Centers for Disease Control and Prevention; COVID-19, coronavirus disease 2019; ICU, intensive care unit; NA, not available. aProspective study.