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Updated: Aug 17, 2026

Human Circadian Phenotyping and Diurnal Performance Testing in the Real World
Published on: April 7, 2020
Relationship between preterm birth and circadian typology in adolescence
Vincenzo Natale1, Alessandra Sansavini, Elena Trombini
1Department of Psychology, University of Bologna, Viale Berti Pichat 5, 40127 Bologna, Italy. vincenzo.natale@unibo.it
Abstract:
A possible relationship between preterm birth and circadian typology was investigated in two pilot survey studies involving 13-year-old teen-agers. Two different questionnaires were used: the Junior Morningness-Eveningness Questionnaire (MEQ) (administered to 55 preterm and 210 fullterm subjects) and the Junior Composite Scale (CS) (administered to 40 preterm and 318 fullterm subjects). In both surveys, preterm groups presented significantly higher total scores, indicating a higher propensity to morningness. Indeed in the preterm samples no evening types were found. The results are discussed in relation to recent models of circadian regulation of the sleep-wake cycle.
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