Observational Study
Copyright ©The Author(s) 2015.
World J Gastroenterol. Jan 7, 2015; 21(1): 318-325
Published online Jan 7, 2015. doi: 10.3748/wjg.v21.i1.318
Table 3 Forced expired volume in 1 s (% predicted) comparing study patients and controls in the 5-year period prior to the study
FEV1Study group
Control group
P-value
nMean % predicted ± SDnMean % predicted ± SD
1st yr1768.8 ± 19.52270.0 ± 16.90.837
2nd yr2166.6 ± 19.12971.0 ± 16.30.386
3rd yr2169.7 ± 21.02569.9 ± 18.20.978
4th yr2167.7 ± 20.42968.5 ± 18.60.876
5th yr2270.7 ± 20.11768.5 ± 19.80.691