Table 2. Mean peak expiratory flow rate measurements sitting and standing
Standing PEF lmin–1 (SD)Sitting PEF (SD)Difference (95% CI)P-value
Total (n = 199)438.4 (121)429.7 (118)8.7 (3.6 to 13.8)0.001
Men (n = 88)518.7 (111)506.3 (107)12.4 (3.3 to 21.5)0.008
Women (n = 111)374.7 (86)368.9 (86)5.8 (0.11 to 11.5)0.046
Asthma diagnosis (n = 44)395.3 (115)393.0 (103)2.4 (-6.7 to 11.5)0.600
No asthma (n = 153)451.6 (121)441.2 (120)10.4 (4.3 to 16.5)0.001
  • P<0.05 is signficant. PEF = peak expiratory flow. SD = standard deviation.