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Table 2 Comparison of lung function and respiratory muscle strength and coughing ability of various groups

From: Effect of abdominal weight training with and without cough machine assistance on lung function in the patients with prolonged mechanical ventilation: a randomized trial

Variable Group Pre Post p value
Mean ± SD Mean ± SD
RR (bpm) A 24.25 ± 5.63 25.17 ± 4.06 0.503
B 25.79 ± 5.37 23.00 ± 4.57 0.131
C 26.14 ± 7.21 25.00 ± 6.84 0.550
RSBI A 82.50 ± 39.87 70.25 ± 27.10 0.034*
B 90.14 ± 36.20 70.29 ± 26.46 0.055
C 97.79 ± 44.88 89.36 ± 38.60 0.730
TV (ml) A 343.50 ± 132.90 404.58 ± 138.35 0.012*
B 315.21 ± 99.81 359.79 ± 104.27 0.167
C 278.07 ± 73.09 302.07 ± 73.14 0.258
VC (ml/kg) A 9.95 ± 4.18 10.80 ± 3.36 0.433
B 10.88 ± 7.19 13.86 ± 7.63 0.023*
C 9.42 ± 6.34 9.38 ± 5.40 0.646
MIP (cmH2O) A 30.50 ± 11.73 36.00 ± 10.79 0.011*
B 29.86 ± 12.14 36.14 ± 10.42 0.011*
C 28.43 ± 9.74 26.71 ± 10.77 0.666
MEP (cmH2O) A 30.58 ± 15.19 41.50 ± 18.33 0.033*
B 27.29 ± 12.76 42.43 ± 16.96 < 0.001*
C 28.86 ± 10.25 29.57 ± 14.21 0.900
PEFR (L/min) A 61.67 ± 15.72 62.92 ± 16.85 0.276
B 57.86 ± 10.51 72.14 ± 35.72 0.080
C 58.57 ± 16.10 61.07 ± 19.82 0.680
PCF (L/min) A 105.83 ± 16.21 114.17 ± 15.20 0.011*
B 108.57 ± 18.85 131.79 ± 38.96 < 0.001*
C 108.57 ± 19.96 109.86 ± 17.44 0.753
  1. RR respiratory rate, RSBI rapid shallow breathing index, TV tidal volume, VC vital capacity, MIP/MIP maximal inspiratory/expiratory pressure, PEF peak expiratory flow, PCF peak cough flow
  2. A = Abdominal weight training, AWT group, B = cough machine assisted abdominal weight training, AWT + CM group, C = Control group
  3. Comparison of Lung Function and respiratory muscle changes (post-study vs pre-study)
  4.  *p < 0.05 are marked as bold