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Table 1 Comparison between the quality of the sweat test based on the concentrations of sweat chloride and sweat sodium (proposed criteria) and the gender and age of subjects examined, as well as the results of the sweat test in view of the sweat chloride concentration obtained in the exam

From: Quality of sweat test (ST) based on the proportion of sweat sodium (Na) and sweat chloride (Cl) as diagnostic parameter of cystic fibrosis: are we on the right way?

Variable Group Quality of Sweat Test by Proposed Criteria p-value ORcorrect 95 % CI ORincorrect 95 % CI
Correct Incorrect Total
Gender Male 2707 316 3023 0.001 1.311 1.115 to 1.541 0.763 0.649 to 0.897
Female 2300 352 2652 1 - 1 -
Total 5007 668 5675     
Result of diagnosis of cystic fibrosis <30 mEq/L 3462 189 3651 < 0.001 5.633 4.711 to 6.734 0.178 0.148 to 0.212
≥ 30 to < 40 mEq/L 538 114 652 0.584 0.468 to 0.728 1.712 1.374 to 2.135
≥ 40 to < 60 mEq/L 471 202 673 0.239 0.198 to 0.289 4.180 3.456 to 5.057
≥ 60 mEq/L 552 164 716 0.380 0.312 to 0.463 2.630 2.160 to 3.203
Total 5023 669 5692     
Subject’s age 0 to 6 months 598 36 634 < 0.001 2.312 1.634 to 3.27 0.433 0.306 to 0.612
> 6 months to ≤ 18 years 3591 306 3897 2.883 2.44 to 3.405 0.347 0.294 to 0.410
> 18 years 778 302 1080 0.210 0.177 to 0.25 4.755 4.001 to 5.650
Total 4967 644 5611     
  1. OR odds ratio, CI confidence interval, % percentage, mEq/L milliequivalents per liter. Alpha = 0.05