Table 1 Patient characteristics at birth and on the days corresponding to Kangaroo care sessions.

From: Statistical Modeling of Heart Rate Variability to Unravel the Factors Affecting Autonomic Regulation in Preterm Infants

Characteristics Median IQR
Gestational age (GA) (weeks) 28.8 27–30.4
    GA ≤ 28 weeks (n = 27) 26.9 25.6–27.4
    GA > 28 weeks (n = 39) 30.3 29–31.1
Birth weight (BW), g 1155 950–1330
    ELBW (BW < 1000 g), g (n = 22) 845 740–950
    VLBW (1000 g ≤ BW < 1500 g), g (n = 37) 1255 1139–1330
    LBW (1500 ≤ BW < 2499 g), g (n = 7) 1650 1621–1739
Length of stay in NICU, day 10.23 5–23.44
Number of KC sessions per infant 14.5 6–32
Duration of KC per session, min 100 81–120
PMA for all KC sessions, week 31 29.6–32.4
Postnatal age for all KC sessions, day 16 8–31
  1. Abbreviations: IQR, interquartile range; ELBW, extremely low birth weight; VLBW, very low birth weight; LBW, low birth weight; PMA, Postmenstrual Age.