Trends in outcomes and hospitalization charges among mechanically ventilated patients with myasthenia gravis in the United States

Nizar Souayah, Abu Nasar, M. Fareed K Suri, Jawad F. Kirmani, Mustapha A. Ezzeddine, Adnan I. Qureshi

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Introduction: To assess the impact of new therapeutic strategies on outcome and cost of hospitalization among patients with myasthenia gravis (MG) who are mechanically ventilated in United States. Methods: Using a retrospective analysis of cross sectional survey, we determined the rates of occurrence, in-hospital outcomes, and mean hospital charges for patients hospitalized with MG requiring mechanical ventilation in 1991-1992 using the Nationwide Inpatient Survey (NIS) and compared these outcomes with homologous data from 2001-2002. NIS is the largest all-payer inpatient care database in the United States. Results: When comparing data from 2001-2002 with data from 1991-1992, we found a higher number of admissions for MG that required mechanical ventilation (994 vs. 652). The proportion of women was similar (53% vs. 60%). The average age (in years ± standard deviation) was significantly higher (65 ± 17 vs. 58 ± 18, p=0.0002). The length of hospitalization (in days ± standard deviation) was not different (22 ± 19 vs. 21 ± 16). Discharge to home occurred less frequently (29% vs. 60%, p=0.0001) and in hospital mortality minimally lower (13% vs. 15%). There was a significant increase in mean hospital charges ($118,000 vs. $84,100 adjusted for inflation, p=0.0001). In hospital mortality was higher among urban teaching hospitals compared with urban non teaching hospitals in 2001-2002. Conclusions: Despite improvement in therapeutic strategies from 1991 to 2002, there was only a modest reduction in mortality and no substantial reduction of length of hospitalization for patients with MG requiring mechanical ventilation.

Original languageEnglish (US)
Pages (from-to)209-214
Number of pages6
JournalInternational Journal of Biomedical Science
Issue number3
StatePublished - Sep 15 2009


  • Cost
  • Length of stay
  • Mechanical ventilation
  • Mortality
  • Myasthenia crisis
  • Myasthenia gravis
  • Outcome


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