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Table 1 Bivariate analysis of parameters associated with 30 days mortality

From: The association between serum magnesium levels and community-acquired pneumonia 30-day mortality

   Total   30 day mortality    95%CI  
   Number Percent (%) Number Percent % P value OR lower Upper
  Total patients 3851   587 15.2%     
Age (years) < 65 1215 32% 81 6.7% 0.000 1.00 0.00 0.00
65–69 354 9% 31 8.8% 0.180 1.34 0.87 2.07
70–79 947 25% 156 16.5% 0.000 2.76 2.08 3.67
80–85 545 14% 114 20.9% 0.000 3.70 2.73 5.03
> 85 790 21% 205 25.9% 0.000 4.91 3.72 6.47
Gender Male 2136 55% 339 15.9% 0.226 1.12 0.93 1.33
Female 1715 45% 248 14.5% 0.000 1.00 0.00 0.00
Albumin (g/dl) 3.5–4 374 10% 8 2.1% 0.000 1.00 0.00 0.00
3–3.4 728 19% 39 5.4% 0.016 2.59 1.20 5.60
2–3 2649 69% 303 14.2% 0.000 7.59 3.73 15.46
< 2 520 14% 220 42.3% 0.000 33.55 16.30 69.05
BUN (mg/dl) < 20 1690 44% 108 6.4% 0.000 1.00 0.00 0.00
20–39 1479 38% 239 16.2% 0.000 2.82 2.22 3.59
40–59 438 11% 130 29.7% 0.000 6.18 4.66 8.20
≥60 244 6% 110 45.1% 0.000 12.03 8.74 16.54
RDW (%) < 14.5 1647 43% 128 7.8% 0.000 1.00 0.00 0.00
≥14.5 2204 57% 459 20.8% 0.000 3.12 2.54 3.84
Phosphorus (mg/dl) 1.51 < IP < 3.99 2841 74% 339 11.9% 0.000 1.00 0.00 0.00
≤1.5 49 1% 14 28.6% 0.001 2.95 1.57 5.54
4–4.49 479 12% 79 17.2% 0.002 1.53 1.16 2.01
≥4.5 482 13% 155 32.2% 0.000 3.50 2.80 4.37
Magnesium (mg/dl) 1.35–2 3136 81% 406 12.9% 0.000 1.00 0.00 0.00
≤1.35 342 9% 63 18.4% 0.005 1.52 1.13 2.03
2–2.4 347 9% 105 30.3% 0.000 2.92 2.27 3.75
≥2.4 26 1% 13 50% 0.000 6.72 3.10 14.61
  1. Abbreviations: OR odds ratio, CI confidence interval, BUN blood urea nitrogen, RDW Red blood cell distribution width