Table 1– Characteristics of cases and controls at inclusion

Characteristics	Cases	Controls	p-value
Males	15/30 (50)	30/60 (50)
Mean age years	17.3 (14.7–19.9)^¶	17.4 (15.6–19.2)⁺	0.8
ΔF508/ΔF508	16/27 (59.26)	34/52 (65.38)	0.3
Mean BMI	18.4 (17.1–19.7)^¶	18.3 (17.6–9.1)^§	1.0
Mean FEV₁ % pred	54.4 (46.7–62.1)^ƒ	64.4 (57.6–71.3)^##	0.07
Use of pancreatic enzymes^#	29/29 (100)	57/60 (95.0)
Mean concentration of chloride in sweat mmol	110.5 (97.7–123.4)^¶¶	104.7 (94.2–115.3)⁺⁺	0.5

Data are presented as n/N (%) or mean (95% confidence interval), unless otherwise stated. BMI: body mass index; FEV₁: forced expiratory volume in 1 s; % pred: % predicted.^#: the log-likelihood ratio test was not applicable because there were no nonexposed cases matched to exposed controls; ^¶: n=30; ⁺: n=60; ^§: n=59; ^ƒ: n=27;^##: n=53; ^¶¶: n=26; ⁺⁺: n=42.