Table 4.

The predictors of mortality according to univariate and multivariate logistic regression analyses

Predictor variable	Number of survivors (N/%)	Number of non-survivors (n/%)	Univariate analysis		Multivariate analysis
			O.R. (95% C.I.)	P-value	O.R. (95% C.I.)	P-value
Age (years)
< 40	56 (73.7%)	20 (26.3%)
≥ 40	2(7.7%)	24 (92.3%)	3.4 (2.8-5.2)	0.012	5.8(3.7-17.3)	0.002
Sex
Male	54 (47.4%)	40(42.6%)
Female	4 (50.0%)	4 (50.0%)	0.2 (0.1-5.4)	0.675	0.4 (0.3-2.1)	0.986
Incubation period(days) (N = 88)
< 7	24 (37.5%)	40(62.5%)
≥ 7	20(83.3%)	4 (16.7%)	6.3(3.6-9.7)	0.002	0.5(0.3-0.9)	0.014
Period of onset (hours) (N = 65)
< 48	11 (29.7%)	26 (70.3%)
≥ 48	10 (35.7%)	18 (64.3%)	0.4 (0.2-2.6)	0.561	1.7 (0.5-3.2)	0.937
Prior immunization
Yes	16(66.7%)	8 (33.3%)
No	42(53.8%)	36(46.2%)	3.9 (0.4-6.2	0.068	0.9 (0.5-2.5)	0.561
Admission pattern
ICU	48(57.1%)	36 (42.9%)
Wards	10 (55.6%)	8 (44.4%)	4.4(0.6-6.7)	0.491	3.8(0.7-4.9)	0.849
Type of tetanus
Generalized	56 (55.6%)	43 (43.4%)
Cephalic	1(50.0%)	1 (50.0%)	2.5 (0.9-3.1)	0.067	1.7(0.2-5.4)	0.082
Localized	1(100%)	-
Severity of tetanus (N = 78)
Moderate	7(87.5%)	1 (12.5%)
Severe	27(38.6%)	43 (61.4%)	2.4(1.3-6.3)	0.012	4.7(2.5-9.1)	0.001
Debridement done
Yes	34 (63.0%)	20 (37.0%)
No	24 (50.0%)	24 (50.0%)	2.4(0.6-3.9)	0.075	5.1(0.9-6.8)	0.089
Tracheostomy done
Yes	14 (87.5%)	2 (12.5%)
No	44(51.2%)	42(48.8%)	3.1(1.4-7.3)	0.011	4.9(2.3-8.1)	0.004
Need for ventilatory support
Yes	26(81.3%)	6(18.7%)
No	32 (45.7%)	38 (54.3%)	1.7(1.1-4.5)	0.032	0.2 (0.1-0.8)	0.013
Complications
Present	35 (62.5%)	21 (37.5%)
Absent	23(50.0%)	23 (50.0%	3,9(0.5-4.3)	0.063	1.6(0.4-6.2)	0.911