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Table 2 Crude and age–sex–education-adjusted associations for potential determinant factors and the incidence of the symptomatic COVID-19 in close contacts of COVID-19 recovered patients, within 3 weeks after discharge

From: Incidence of symptomatic COVID-19 in close contacts of patients after discharge from hospital

Potential determinant factors of being a source of infection

New case in closed contacts; n (%)

Crude OR (95% CI)

Adjusted odds ratio (CI)

Yes; 41 (11.78)

No; 307 (88.22)

Age (year), mean (± sd)

54.19 (15.90)

53.72 (15.98)

1.00 (0.98–1.02)

Sex

 Female

19 (46.34)

107 (34.85)

1

 Male

22 (53.66%)

200 (65.15)

0.62 (0.32–1.19)

Level of education

 Low

23 (56.10)

151 (86.78)

1

 High

18 (43.90)

138 (86.78)

1.16 (0.60–2.25)

Comorbidity

 No

10 (2.87)

128 (36.78)

1

1

 Yes

31 (8.91)

179 (51.44)

2.22 (1.05–4.68)*

2.48 (1.13–0.45)*

Hospital duration

 Less than 3 days

21 (51.22)

150 (49.02)

1

 More than 3 days

20 (48.78)

156 (50.98)

0.91 (0.47–1.75)

Having symptoms after discharge

 No

15 (36.59)

107 (34.85)

1

 Yes

26 (63.41)

200 (65.15)

0.92 (0.47–1.82)

Visit health centers after discharge

 No

29 (72.50)

177 (59.60)

1

 Yes

11 (27.50)

120 (40.40)

0.55 (0.26–1.16)

Return to job

 No

26 (74.29)

194 (72.12)

1

 Yes

9 (25.71)

75 (27.88)

0.89 (0.40–1.99)

Days not to go out

 Less than 3 weeks

25 (60.98)

165 (53.75)

1

 More than 3 weeks

16 (39.02)

142 (46.25)

0.74 (0.38–1.44)

Home density

 Moderate

14 (34.15)

151 (49.19)

1

1

 Low

15 (36.59)

103 (33.55)

1.57 (0.72–3.39)

1.58 (0.71–3.49)*

 High

12 (29.27)

53 (17.26)

2.44 (1.06–5.61)*

2.80 (1.18–6.62)

Quality of isolation

 High

24 (58.54)

62 (23.40)

1

1

 Low

17 (41.46)

203 (76.60)

2.31 (1.17–4.59)*

2.20 (1.09–4.45)*

  1. – Dropped from the final model
  2. *Significant at level of 0.05