Total number of 336 patients were included in the study. The majority were males 282 patients (83.9%), females 54 patients (16.1%) with median age was 44 years (IQR 36–54.5). National (Emirati) were 21 patients (6.3%) and Non-National 315 patients (93.8%). 31 patients (9.2%) were aged 18–29, 186 patients (55.4%) were aged 30–49, 80 patients (23.8%) were aged 50–60 and 39 patients (11.6%) were aged > 60. The minimum age was 19 years and 89 years was the maximum age.
Patient who had Risk factors (comorbidities) were 87.8% of the patients with diabetes mellitus being the most common risk factor (25.0%), followed by hypertension (22.9%) and Age ≥ 60 were (13.4%) (Table 1).
Patients were classified according to signs and symptoms into three levels, level A for patients were Asymptomatic OR mild symptoms with radiological evidence of pneumonia (Mild), Level B for patients who were Asymptomatic with radiological evidence of pneumonia OR mild URTI with risk factors (Moderate) while level C was for critically ail patients.
For level A patients, 75 patients (70.1%) were males compared to 32 females (29.9%). For patient level B, 194 patients (90.2%) were males compared to 21 patients females (9.8%). For patients level C, 13 patients (92.9%) were males compared to 1 female patient (7.1%) (Table 2).
Patients aged between 18–29 years were 16 patients (15%) in level A, 15 patients (7%) in level B and 0 patient (0%) in level C. Patients aged between 30–49 years were 56 (52.3%) in level A, 124 (57.7%) in level B and 6 (42.9%). Patients aged between 50–60 years were 17 (15.9%) in level A, 58 (27%) in level B and 5 (35.7%) in level C. Patient age > 60 were 18 (16.8%) in level A, 18 (8.4%) in level B and 3 (21.4%) in level C (Table 2).So gender male was significantly in level B with p = 0.109
Total 36 patients (10.7%) were asymptomatic. The most common presenting symptoms in the symptomatic patients were upper respiratory tract symptoms, manifested as dry cough (70.2%), and followed by fever (54.2%), shortness of breath (43.5%), headache (25.9%) and sore throat (25.3%). Less common symptoms were diarrhea (16.7%) chest pain (14.6%). (85.5%) patients were with QTc result on ECG < 430, (10%) patients were 430–450 and (4.5%) patients were > 450 (table 3). D-dimer results < 1 mcg/mL were (49.4%) and (17.3%) were > 1 mcg/mL (Table 3).
The minimum length of stay is 1 day and the maximum is 32 days. The mean length of stay was 5 ± 4.8 days and the median (IQR) 3 (2–6) (Table 3). The minimum length of stay in [ICU/HDU] was 1 day and the maximum was 21 days. The Mean length of stay in [ICU/HDU] 6.3 ± 5.8 and the median (IQR) was 4 (1–9) (table 3).
Patients aged between 30–49 with no risk factors were 124 (66.7%) followed by patients aged between 30–49 45 (24.2%) with only1 risk factor (table 4). Patient with mild symptoms were 15 (48.4%) aged between 18–29, 85 patients (45.7%) aged between 30–49, 28 patients (35%) aged between 50–60 and 15 patients (38.5%) aged > 60. Patients with moderate/severe symptoms were 11(35.5%) aged between 18–29, 86 patients (46.2%) aged between 30–49, 43 patients (53.7%) aged between 50–60 and 17 patients (43.6%) aged > 60 (table 4).
Among 336 patients who were discharged or had deceased at the study end, total number of patients who died is 12 patients with mortality rate is (3.5%). 10 patients of them male (83.3%) while 91.7% were non-national.
The readmission rate within 14 days of discharge was 4.7% with total number of 16 patients, 15 patients of them is non-national (93.7%)
For both patients discharged alive and those who died it was noticed that half of the deceased patients (50%) were aged 30–49 and 5 patients of them in that age is male with (83.3%).
Total number of 16 patients were readmitted to the hospital within 14 days of discharge with 10 patients males (62.5%) and 6 patients females (37.5%). 7 patients (43.7%) with age of 30–49 were readmitted within 14 days of discharge.
Average length of stay for discharge patients was 4.8 days while for deceased patients was 10.2 days. 53 patients (28.4%) of the age of 30–49 used oxygen therapy and 86.8% were on nasal cannula.
16 patients had unplanned readmission (table 5). Patients who had ECG done on admission were (98.3%) (Table 6). Majority of patients discharged to Quarantine (table 7).
The highest risk factor in deceased patients was diabetes mellitus (58.3%) (Table 5).