Karen J Johnson
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Explore the profile of Karen J Johnson including associated specialties, affiliations and a list of published articles.
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19
Citations
389
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Recent Articles
1.
Colaizy T, Poindexter B, McDonald S, Bell E, Carlo W, Carlson S, et al.
JAMA
. 2024 Mar;
331(7):582-591.
PMID: 38497706
Importance: Maternal milk feeding of extremely preterm infants during the birth hospitalization has been associated with better neurodevelopmental outcomes compared with preterm formula. For infants receiving no or minimal maternal...
2.
Chock V, Kirpalani H, Bell E, Tan S, Hintz S, Ball M, et al.
JAMA Netw Open
. 2023 Sep;
6(9):e2334889.
PMID: 37733345
Importance: Preterm infants with varying degrees of anemia have different tissue oxygen saturation responses to red blood cell (RBC) transfusion, and low cerebral saturation may be associated with adverse outcomes....
3.
Green C, Tyson J, Heyne R, Hintz S, Vohr B, Bann C, et al.
J Perinatol
. 2023 Aug;
43(11):1398-1405.
PMID: 37542155
Objective: Extremely preterm (EP) impairment rates are likely underestimated using the Bayley III norm-based thresholds scores and may be better assessed relative to concurrent healthy term reference (TR) infants born...
4.
Chatmethakul T, Schmelzel M, Johnson K, Walker J, Santillan D, Colaizy T, et al.
Nutrients
. 2022 Dec;
14(24).
PMID: 36558383
Perinatal leptin deficiency and reduced intake of mother’s milk may contribute to the development of childhood obesity. Preterm infants have reduced leptin production, and they are at heightened risk of...
5.
Rysavy M, Colaizy T, Bann C, DeMauro S, Duncan A, Brumbaugh J, et al.
J Perinatol
. 2021 Mar;
41(9):2270-2278.
PMID: 33758389
Objective: Determine how neurodevelopmental impairment (NDI) relates to concurrent outcomes for children born extremely preterm. Study Design: Retrospective cohort study children born 22 0/7-26 6/7 weeks' gestation at NICHD Neonatal...
6.
Kirpalani H, Bell E, Hintz S, Tan S, Schmidt B, Chaudhary A, et al.
N Engl J Med
. 2020 Dec;
383(27):2639-2651.
PMID: 33382931
Background: Limited data suggest that higher hemoglobin thresholds for red-cell transfusions may reduce the risk of cognitive delay among extremely-low-birth-weight infants with anemia. Methods: We performed an open, multicenter trial...
7.
Vass R, Roghair R, Bell E, Colaizy T, Johnson K, Schmelzel M, et al.
Nutrients
. 2020 Mar;
12(3).
PMID: 32143273
Our aims were to investigate the presence of pituitary glycoprotein hormones in preterm and donor milk, and to examine the effects of Holder pasteurization and refrigeration on the levels of...
8.
Vass R, Bell E, Colaizy T, Schmelzel M, Johnson K, Walker J, et al.
Pediatr Res
. 2020 Jan;
88(4):612-617.
PMID: 32000260
Background: After birth, breastfeeding is the exclusive source of hormonal signaling between mother and infant. Hospitalized infants often receive donor milk when their own mother's milk is unavailable. Methods: The...
9.
Steinbrekera B, Colaizy T, Vasilakos L, Johnson K, Santillan D, Haskell S, et al.
Pediatr Res
. 2019 Mar;
85(7):1016-1023.
PMID: 30845123
Background: Cord blood leptin increases with advancing gestation. Preterm delivery leads to premature separation from the maternal and placental leptin source predisposing infants to postnatal leptin deficiency, but this has...
10.
OBrien E, Colaizy T, Brumbaugh J, Cress G, Johnson K, Klein J, et al.
J Matern Fetal Neonatal Med
. 2018 Feb;
32(16):2763-2766.
PMID: 29478358
Objective: Hypothermia occurs frequently in the first minutes after birth in preterm infants. Hyperthermia also occurs, often as a consequence of efforts to provide thermal support. Both hypothermia and hyperthermia...