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Table 4 Univariate and multivariate cox proportional hazard model fitting results

From: Patterns and patient factors associated with loss to follow-up in the Muhimbili sickle cell cohort, Tanzania

  Univariate Analysis Multivariate Analysis
Estimate Hazard ratio P-value Estimate Hazard ratio P-value 95% CI
Sex (Male) 0.0819 1.0853 0.1590     
Pre blood transfusion (Yes) 0.1076 1.1136 0.4840     
Pre dactylitis (Yes) − 0.2414 0.7855 0.677     
Pre pain (Yes) 0.1135 1.1202 0.0669     
Pre chest (Yes) 0.1227 1.1305 0.415     
Pre convulsion (Yes) −0.7094 0.4919 0.2200     
Pre leg ulceration (Yes) −0.9425 0.3897 0.103     
Pre priapism (Yes) 0.2814 1.325 0.574     
Pain (Yes) −0.2834 0.7532 0.0005     
Fever (Yes) 0.2295 1.2579 0.0359     
Age group (5–17) 1.0212 2.7764 <2e-16 0.9624 2.6181 < 0.0001 2.2324–3.0705
Age group (0–4) 2.9007 18.1868 <2e-16 2.6602 14.2995 < 0.0001 11.007–118.5768
Well today (Yes) 0.1839 1.2019 0.0027 0.1249 1.1331 0.0495 1.0003–1.2837
Mean corpuscular volume (fL) −0.0049 0.9951 0.0925     
Mean cell hemoglobin (pg) −0.0369 0.9638 3.26E-06     
Mean corpuscular hemoglobin concentration (g/dL) −0.0812 0.922 1.43E-10     
White blood cells (10^3/uL) 0.0349 1.0355 8.74E-15 0.0157 1.0158 0.0074 1.0042–1.0276
Red blood cells (10^6/uL) 0.0421 1.043 0.28     
Mean platelet volume (fL) −0.1372 0.8718 4.58E-06     
Hemoglobin concentration (g/dL) −0.0371 0.9635 0.0753     
Diastolic blood pressure −0.0047 0.9953 0.156     
Systolic blood pressure −0.0183 0.9819 1.29E-13 −0.0078 0.9922 0.0022 0.9872–0.9972
Temperature 0.109 1.1151 0.0485     
Hematocrit (%) 0.0034 1.0034 0.618 0.0235 1.0238 0.0039 1.0076–1.0404
  1. Variables starting with “Pre” were attributes that were collected from patients asking on any episodes that they faced since their last clinic that required OPD attendance or admission
  2. Fever this attribute explains if one has fever (1) or does not have(0); painful this attribute says if one has painful episodes (1) or not (0) and well_today states if one is well (0) or not well
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