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Table 2 Clinical characterization of the asthmatics study population

From: Genetic polymorphisms and asthma: findings from a case–control study in the Madeira island population

  Study sample set
  Overall asthma Intermittent asthma Persistent asthma Mild Moderate-severe p-value
Sample size (n,%) 98 (100.0) 24 (24.5) 74 (75.5) 44 (59.9) 30 (40.5)  
Male/Female (%) 59.2/40.8 62.5/37.5 58.1/41.9 54.5/45.5 63.3/36.7  
Mean age (years + -s.d.) 13.6 + -4.3 14.1 + -3.5 13.4 + - 4.5 14.3 + -4.6 12.0 + - 4.1  
Mean FEV1 (%) 96.9 + -14.7 98.5 + -16.3 96.4 + -14.2 99.9 + -10.7 91.2 + - 17.1 0.008
Mean FVC (%) 95.0 + -12.8 97.4 + -12.1 94.3 + -13.0 97.3 + -9.9 89.8 + -15.6 0.025
  1. Asthma classification according to GINA [75].
  2. A Shapiro-Wilk test showed that FEV1 is normally distributed (p > 0.05) while FVC is not (p = 0.008). Thus, a t-test was used for the analysis of FEV1 while a Mann–Whitney test was used for FVC. Statistically significant p-values were found for comparisons between mild persistent and moderate-severe persistent asthma, denoted in bold.