Figure 1
From: Birth weight and prematurity with lung function at ~17.5 years: “Children of 1997” birth cohort

LOWESS curves showing association of birth weight, gestational age with lung function in original units by sex in Hong Kong’s “Children of 1997” Birth Cohort. Abbreviations: FEV1, forced expiratory volume in 1 second; FVC, forced vital capacity; FEF25–75%, forced expiratory flow at 25–75% of the pulmonary volume. Birth weight z-score refers to internal sex- and gestational age-specific z-scores.