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Table 2 Comparison of the mortality risk between patients with and without methanol poisoning by Cox proportional hazard regression analysis

From: Association between acute methanol poisoning and subsequent mortality: a nationwide study in Taiwan

Variable With methanol poisoning
n = 621
Without methanol poisoning
n = 6210
Crude HR (95% CI) AHR (95% CI)a
n Mortality PY Rate n Mortality PY Rate
Overall 621 249 3105.92 80.17 6210 154 44,990.66 3.42 21.08 (17.21–25.82) 13.48 (10.76–16.88)
Age (years)
 < 20 9 0 76.90 90 0 769.01
 20–34 151 42 934.42 44.95 1510 9 11,770.88 0.76 53.89 (26.18–110.93) 31.75 (14.19–71.03)
 35–49 259 106 1240.12 85.48 2590 33 18,397.97 1.79 41.32 (27.88–61.24) 26.68 (17.25–41.27)
 50–64 149 78 659.97 118.19 1490 59 11,022.98 5.35 19.01 (13.50–26.78) 13.10 (8.93–19.25)
 ≥ 65 53 23 194.52 118.24 530 53 3029.83 17.49 7.24 (4.41–11.88) 8.02 (4.62–13.91)
Sex
 Female 110 27 591.97 45.61 1100 15 7491.75 2.00 20.66 (10.93–39.04) 16.56 (8.12–33.76)
 Male 511 222 2513.96 88.31 5110 139 37,498.91 3.71 21.43 (17.30–26.54) 13.42 (10.56–17.06)
Follow-up period           
 < 6 months 621 113 85.88 1315.84 6210 1 1031.09 0.97 621.91 (153.64–2517.36) 480.34 (117.55–1962.75)
 6–12 months 486 11 237.92 46.23 6071 10 3002.59 3.33 13.85 (5.88–32.62) 6.09 (2.23–16.59)
 ≥ 1 years 464 113 2617.18 43.18 5943 135 38,911.05 3.47 12.45 (9.70–15.99) 7.70 (5.82–10.21)
  1. AHR adjusted hazard ratio, CI confidence interval, PY person-year, CAD coronary artery disease, COPD chronic obstructive pulmonary disease
  2. aAdjusted for hypertension, diabetes, hyperlipidemia, stroke, CAD, COPD, renal disease, liver disease, malignancy, drug abuse, mental disorder, and monthly income