Table 1 Socio-demographic characteristics and clinical variables of respondents who developed surgical site infection after surgery, 2016, Addis Ababa, Ethiopia

Age (years)

18–24

7 (14.3%)

42 (85.7%)

49 (100%)

24–34

15 (19.5%)

62 (80.5%)

77 (100%)

35–60

23 (30.3)

53 (69.7%)

76 (100%)

> 60

16 (34%)

31 (66%)

47 (100%)

Sex

Male

30 (30%)

70 (70%)

100 (100%)

Female

31 (20.8)

118 (79.2)

149 (100%)

Religion

Orthodox Christian

42 (25%)

126 (75%)

168 (100%)

Muslim

13 (26%)

37 (74%)

50 (100%)

Protestant

6 (19%)

25 (80.6%)

31 (100%)

Residence

Addis Ababa

27 (26.7%)

74 (73.3%)

148 (100%)

Out of Addis Ababa

34 (23%)

114 (77%)

101 (100%)

Single

16 (27.1)

43 (72.9%)

59 (100%)

Married

42 (24.1)

132 (75.9%)

174 (100%)

Marital status

Divorced

2 (28.6%)

5 (71.4%)

7 (100%)

Widowed

1 (11.1%)

8 (88.9%)

9 (100%)

Illiterate

20 (37%)

34 (63%)

54 (100%)

Education

Primary school

19 (19.8)

77 (80.2%)

96 (100%)

Secondary school

17 (25%)

51 (75%)

68 (100%)

Higher Education

5 (16.1%)

26 (83.9%)

31 (100%)

Under weight(< 18)

10 (52.6%)

9 (47.4%)

19 (100%)

BMI (kg/m²)

normal weight(18–25)

40 (22.5%)

138 (77.5%)

178 (100%)

Overweight (26–29)

11 (21.2%)

41 (78.5%)

52 (100%)

I

51 (25.4%)

150 (74.6%)

201 (100%)

ASA scoring

II

6 (14.3%)

36 (85.7%)

42 (100%)

III

4 (66,7%)

2 (33.3%)

6 (100%)

Type of Anesthesia

General anesthesia

46 (26.1%)

130 (73.9%)

176 (100%)

Spinal anesthesia

15 (20.5%)

58 (79.5%)

73 (100%)

< 2 h

25 (20.9%)

95 (79.2%)

120 (100%)

Intra-operation duration

1-2 h

24 (25.5%)

70 (74.5%)

94 (100%)

> 2 h

12 (34.3%)

23 (65.7%)

35 (100%)

Pre-operative hospital stay

< 2 h

30 (19%)

128 (81%)

158 (100%)

2 to 4 h

15 (30.6%)

34 (69.4%)

49 (100%)

> 4 h

16 (38.1%)

26 (61.4%)

42 (100%)

Wound Classification

Clean

0

125 (100%)

125 (100%)

Clean-contaminated

48 (43.6%)

62 (56.4%)

110 (100%)

Contaminated

7 (50%)

7 (50%)

14 (100%)