Table 2 Background characteristics of included studies.

From: Effectiveness of oral dextrose gel for neonates at risk of hypoglycemia: A systematic review, meta-analysis, and GRADE assessment of randomized controlled trials

Author, year

Study name

Sample size

Study group

Comparison group

Primary Outcome

Evaluation method

Harris et al. 2014 [31]

Double blind RCT

242

40% dextrose gel

Placebo gel

Admission to NICU for hypoglycemia, 30 min after two doses of gel

Glucose oxidase method (Radiometer, ABL800 FLEX, Copenhagen, Denmark)

Hegarty et al. 2016 [32]

RCT

100

40% dextrose gel

Placebo gel

Admission to NICU for hypoglycemia, in the first 48 h after birth

Glucose oxidase method, either with a portable blood glucose analyzer (i-STAT, Abbott Laboratories, Abbott Park, Illinois, United States) or a combined metabolite/blood gas analyzer (e.g., ABL 700, Radiometer, Copenhagen, Denmark)

Harris et al. 2017 [30]

RCT

295

40% dextrose gel

Placebo gel

Changes in blood glucose concentration

Blood gas analyzer (Radiometer, ABL800Flex, Copenhagen, Denmark) using the glucose oxidase method (reading range 0.0-60 mmol/L, coefficient of variation 2.1%)

Coors et al. 2018 [29]

Quasi-Experimental Pilot Study

236

40% dextrose gel (Insta- glucose)

Regular milk feeding without any gel

Admission to NICU for hypoglycemia for IV dextrose

Glucometer (Abbott Precision XceedPro, Alameda, California)

Harding et al. 2021 [23]

Double blinded RCT

2129

40% dextrose gel

Placebo gel

Admission to NICU for hypoglycemia, in the first 48 h after birth

Glucose oxidase method, either with a portable blood glucose analyzer (e.g., iSTAT, Abbott Laboratories, Abbott Park, IL, US) or a combined metabolite/blood gas analyzer (e.g., ABL 700, Radiometer, Copenhagen, Denmark)

  1. *RCT Randomized controlled trial, IV intravenous, NICU Neonatal Intensive Care Unit