Table 2

Characteristics of 31 patients on negative pressure ventilation (shell or tank)

  • Values are mean (SD) unless otherwise stated.

  • a = before ventilation; b = near end of period on ventilation; FVC = forced vital capacity; Pco 2 = carbon dioxide tension.

  • 2-151 Significantly different from polio-M/NIPPV patients (table 3), p<0.05 (Wilcoxon rank sum test).

  • 2-164 Significantly different from polio-M/NIPPV patients (table 3), p< 0.01 (Wilcoxon rank sum test).

  • 2-152 Significantly different from polio-M/NIPPV patients (table 3), p<0.01 (Wilcoxon rank sum test).

  • 2-153 Significantly different from polio-M/NIPPV patients (table 3), p<0.01 (Wilcoxon rank sum test).

  • 2-150 Significantly different from polio-M/NIPPV patients (table 3), p<0.01 (Wilcoxon rank sum test).