|Outcomes||Number of studies||Number of patients||Weighted mean difference||95% CI|
|*All meta-analyses were based on a fixed effects model. Heterogeneity was significant only for the analysis of heart rate.|
|Length of hospital stay||2||87||−7.1 days||−12.6 to −1.7|
|Weight gain||3||103||1.57 g/day||−0.37 to 3.5†|
|Heart rate||4||126||−1.4 beats/minute||−5.9 to 3.1†|
|Oxygen saturation||3||72||1.0%||0.04 to 2.1†|
Review: non-nutritive sucking decreases length of hospital stay in premature infants
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