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Table 3. Trends in mortality and nonfatal outcomes

Outcome / Risk-adjusted rates † / Adjusted rate ratio per period
(95% CI)‡ / P value for trend ‡
2001-2005 / 2006-2009 / 2010-2014
Percent
30-day all-cause mortality / 3.9 / 3.5 / 2.7 / 0.84 (0.74-0.96) / <0.01
7-day all-cause mortality / 0.8 / 0.7 / 0.4 / 0.72 (0.47-1.10) / 0.13
30-day VTE-related mortality / 0.2 / 0.2 / 0.1 / 0.70 (0.44-1.10) / 0.13
30-day bleeding-related mortality / 0.5 / 0.3 / 0.1 / 0.55 (0.40-0.77) / <0.01
Nonfatal complications
30-day VTE recurrences / 1.2 / 1.1 / 0.8 / 0.80(0.68-0.96) / 0.02
30-day major bleeding / 2.8 / 2.3 / 1.8 / 0.80 (0.71-0.90) / <0.001

Abbreviations: VTE, venous thromboembolism; CI, confidence interval

† Risk-adjusted rates of all-cause mortality, VTE-related mortality, and nonfatal complications for each calendar period are reported for the overall cohort. Rates were adjusted for temporal changes in patient and hospital characteristics (see Table 4 for all model covariates).

‡ Adjusted risk ratios and P values for trend were determined with a model evaluating calendar period as a continuous variable

Table 4. Multivariable model of predictors of 30-day mortality*

Variable / Adjusted Odds ratio / 95% CI / P value
Calendar year (per 1 year) / 0.97 / 0.95-0.99 / 0.042
Age (per 1 year) / 1.02 / 1.01-1.02 / < 0.001
Sex (female vs. male) / 1.41 / 1.16-1.71 / < 0.001
Weight (per 1 kilogram) / 0.98 / 0.97-0.99 / < 0.001
History of VTE / 0.80 / 0.59-1.08 / 0.139
Cancer † / 3.10 / 2.57-3.74 / < 0.001
Recent surgery ‡ / 0.72 / 0.52-0.99 / 0.048
Immobilization for 4 days § / 1.92 / 1.54-2.41 / < 0.001
Chronic lung disease / 1.04 / 0.75-1.44 / 0.80
Chronic heart disease / 1.35 / 1.01-1.80 / 0.04
Recent major bleeding / 1.29 / 0.94-1.77 / 0.12
Pulse (per 1 beat/min) / 1.02 / 1.01-1.02 / < 0.001
Systolic blood pressure (per mmHg) / 0.99 / 0.98-0.99 / < 0.001
Abnormal creatinine levels (> 2 mg/dL) / 1.75 / 1.45-2.11 / < 0.001
Hemoglobin (per 1 g/dL) / 0.89 / 0.86-0.93 / < 0.001

* Adjusted odds ratio, 95% confidence intervals and P values are provided for all model covariates included in the multivariable model for 30-day mortality in the overall cohort.

Abbreviations: VTE, venous thromboembolism.

† Active or under treatment in the last year.

‡ In the previous month.

§ Immobilized patients defined as non-surgical patients who had been immobilized (i.e., total bed rest with bathroom privileges) for ≥4 days in the month prior to PE diagnosis.

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