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Table 4 Bivariate analysis for PLOS among patients admitted to the surgical ward of JUMC, Ethiopia

From: Predictors of prolonged length of hospital stay and in-hospital mortality among adult patients admitted at the surgical ward of Jimma University medical center, Ethiopia: prospective observational study

Predictor Variables Categories The outcome variable (PLOS) >  75th percentile (≥33 days) **p-value *p-value
No (%) Yes (%)
Sex Male 146 (81.6) 33 (18.4) 0.169 0.000
Female 55 (61.1) 35 (38.9)
Place of residence Rural 110 (73.8) 39 (26.2) 0.547 0.706
Urban 91 (75.8) 29 (24.2)
Level of monthly income no constant income 33 (70.2) 14 (29.8) 0.291 0.396
<  1500 67 (70.5) 28 (29.5)
1500–6000 81 (79.4) 21 (20.6)
>  6000 20 (80.0) 5 (20.0)
Smoking status No 173 (73.0) 64 (27.0) 0.522 0.076
Yes 28 (87.5) 4 (12.5)
Health care cost coverage Self 171 (76.7) 52 (23.3) 0.023 0.103
Free (gov’t) 30 (65.2) 16 (34.8)
Co-morbid condition No 117 (73.6) 42 (26.4) 0.443 0.606
Yes 84 (76.4) 26 (23.6)
Burn-related surgery No 194 (76.1) 61 (23.9) 0.043 0.036
Yes 7 (50) 7 (50)
Presence of cancer No 173 (77.6) 50 (22.4) 0.028 0.018
Yes 28 (60.9) 18 (39.1)
Presence of trauma No 160 (72.4) 61 (27.6) 0.873 0.060
Yes 41 (85.4) 7 (14.6)
Presence of any chronic disease No 154 (73.3) 56 (26.7) 0.221 0.323
Yes 47 (79.7) 12 (20.3)
Type of admission Elective 95 (68.8) 43 (31.2) 0.864 0.023
Emergency 106 (80.9) 25 (19.1)
Poly-pharmacy No 169 (74.4) 58 (25.6) 0.861 0.811
Yes 32 (76.2) 10 (23.8)
In-hospital SSI No 173 (77.2) 51 (22.8) 0.244 0.035
Yes 28 (62.2) 17 (37.8)
In-hospital sepsis No 191 (74.9) 64 (25.1) 0.366 0.771
Yes 10 (71.4) 4 (28.6)
HAP No 196 (74.8) 66 (25.2) 0.887 1
Yes 5 (71.4) 2 (28.6)
Age (years) 18 to 40 115 (76.2) 36 (23.8) 0.188 0.539
>  40 86 (72.9) 32 (27.1)
Duration of surgery (hrs.) ≤ 1 57 (67.1) 28 (32.9) 0.391 0.083
>  1 107 (76.4) 33 (23.6) 0.678
Not recorded 37 (84.1) 7 (15.9) 0.172
Appropriate use of SAP Yes 35 (66.0) 18 (34.0) 0.404 0.105
No 166 (76.9) 50 (23.1)
Total number of antibiotic exposure ≤ 2 antibiotic exposure 165 (80.1) 41 (19.9) 0.017 0.000
> 2 antibiotic exposure 36 (57.1) 27 (42.9)
ASA class I to II 150 (72.8) 56 (27.2) 0.499 0.193
III to IV 51 (81.0) 12 (19.0)
CDC wound class I 34 (70.8) 14 (29.2) 0.047 0.494
II to IV 167 (75.6) 54 (24.4)
Charlson CI score Zero 70 (72.2) 27 (27.8) 0.303 0.469
>  1 131 (76.2) 41 (23.8)
Before surgery LOS (days) ≤ 7 163 (82.3) 35 (17.7) 0.000 0.000
>  7 38 (53.5) 33 (46.5)
Number of co-morbidity Zero 117 (73.6) 42 (26.4)   0.626
1 to 2 76 (77.6) 22 (22.4) 0.248
≥ 3 8 (66.7) 4 (33.3) 0.248
  1. *p value of chi-square, **p-value for binary logistic regression analysis