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Table 1 Number and proportion of non cooperating subjects at the spirometry tests, divided according to age and sex

From: Reference values of Forced Expiratory Volumes and pulmonary flows in 3–6 year children: a cross-sectional study

  Females Males Total
Age (yrs) Total Non cooperating   Total Non cooperating   Total Non cooperating  
   N %   N %   N %
3 20 2 10.0 29 6 20.7 49 8 16.3*
4 204 9 4.4 230 12 5.2 434 21 4.8
5 200 6 3.0 222 8 3.6 422 14 3.3
6 20 1 5.0 35 1 2.8 55 2 3.6
Tot 450 18 4.0 509 27 5.3 960 45 4.7
  1. * χ2= 11.68, p < 0.01