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Table 2 Description of sedentary behavior trajectory and pulmonary function parameters at 15 and 18 years by sex

From: Screen-based sedentary behavior during adolescence and pulmonary function in a birth cohort

Variable Male Female
Screen time trajectory from 11 to 18 years (N [%])
 Always high 690 (42.07) 631 (36.22)
 Always moderate 838 (51.10) 986 (56.60)
 Always low 112 (6.83) 125 (7.18)
FEV1 at 15 years, L (Mean [SD]) 3.48 (0.66) 2.94 (0.44)
FVC at 15 years, L (Mean [SD]) 4.02 (0.75) 3.30 (0.52)
PEF at 15 years, L/s (Mean [SD]) 7.50 (1.43) 6.62 (1.05)
FEV1 at 18 years, L (Mean [SD]) 4.12 (0.61) 3.04 (0.45)
FVC at 18 years, L (Mean [SD]) 4.80 (0.69) 3.50 (0.51)
PEF at 18 years, L/s (Mean [SD]) 8.77 (1.52) 6.48 (1.15)
  1. FEV1: forced expiratory volume in 1 s; FVC: forced vital capacity; PEF: peak expiratory flow