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Table 3 Relationship between vitamin D status and both frequency and severity of exacerbations in the last year in CF bronchiectasis patients

From: Impact of vitamin D status on CF and non-CF bronchiectasis outcomes

Pulmonary exacerbations in the last year Vitamin D group P-value Post hoc
Deficient (< 20 ng/mL) Insufficient (20–29 ng/mL) Sufficient (≥30 ng/mL)
Frequency Infrequent (< 3 times) 5(33.3%) 4(100.0%) 1(100.0%) 0.033# (I vs II) *, (I vs III) *
Frequent (≥3 times) 10(66.7%) 0(0.0%) 0(0.0%)
Severity Mild 1(6.7%) 4(100.0%) 1(100.0%) <0.001# (I vs II) *, (I vs III) *
Moderate 7(46.7%) 0(0.0%) 0(0.0%)
Severe 7(46.7%) 0(0.0%) 0(0.0%)
  1. *Significant, **highly significant, #chi-square test