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Table 2 Independent sample test comparing age, BMI and spirometric variables between non-obese and obese subjects

From: The effect of obesity on spirometry tests among healthy non-smoking adults

  Group 1 (non-obese) Group 2 (obese)    
  Mean SD Mean SD Mean difference 95% CI P value
Height (cm) 166.75 8.55 166.95 8.93 -0.19 (-2.20, 1.81) 0.848
Weight (kg) 62.40 8.36 94.67 12.16 -32.26 (-34.67, -29.84) < .00001
BMI (kg/m 2 ) 22.37 1.82 33.95 3.47 -11.58 (-12.22, 10.93) < .00001
FEV1 (L) 3.27 0.56 3.24 0.69 0.02 (-0.11, 0.17) 0.686
FEV1% 91.95 9.41 93.76 10.06 -1.81 (-4.05, 0.42) 0.110
FVC (L) 4.00 0.75 3.97 0.88 0.03 (-0.15, 0.22) 0.733
FVC % 95.83 10.10 97.46 10.47 -1.63 (-4.00, 0.73) 0.175
PEF(L/min) 508.42 113.65 479.62 95.62 -28.80 (-53.02, -4.59) 0.020
PEF % 103.09 13.13 96.62 12.30 -6.46 (-9.39, -3.53) < .00001
FEV1/FVC Ratio 81.94 3.86 81.41 3.09 0.53 (-0.26, 1.33) 0.197
FEF 25-75 (L) 3.14 0.63 3.17 0.82 -0.03 (-0.20, 0.13) 0.693
FEF 25-75% 72.12 13.01 75.27 15.47 -3.14 (-6.44, 0.14) 0.061