Table 1.

Search Strategies.

Search Strategy 1 TS = ((“Premature Birth” OR “Infant, Extremely Premature” OR “Infant, Premature”) AND “Mouth” AND (“Physical Therapy Modalities” OR “Physical Therapy Specialty” OR “Physical Therapy Department, Hospital” OR “Physical Therapist Assistants”))
Database	Total Results	Filters and Inclusion Criteria	Elimination of Duplicates	Valid Results
PubMed	n = 4	n = 4	n = 4	n = 4
Scopus	n = 0	n = 0	n = 0	n = 0
WoS 1	n = 0	n = 0	n = 0	n = 0
Search Strategy 2 TS = ((“Premature Birth” OR “Infant, Extremely Premature” OR “Infant, Premature”) AND “Mouth”)
Database	Total Results	Filters and Inclusion Criteria	Elimination of Duplicates	Valid Results
PubMed	n = 282	n = 23	n = 19	n = 3
Scopus	n = 427	n = 82	n = 73	n = 0
WoS	n = 527	n = 62	n = 53	n = 3
Search Strategy 3. Advanced Search. “Premature” for title and abstract, “Stretching, mobilisation, manipulation, massage” for Therapy, “Head or neck” for Body part y “Clinical trial” for Method.
Database	Total Results	Filters and Inclusion Criteria	Elimination of Duplicates	Valid Results
PEDro 2	n = 2	n = 1	n = 1	n = 1
Search Strategy 4. Simple Search. “Oral sensorimotor intervention”
Database	Total Results	Filters and Inclusion Criteria	Elimination of Duplicates	Valid Results
PEDro	n = 6	n = 0	n = 0	n = 0
Search Strategy 5. Simple Search. “Physiotherapy in premature infants”
Database	Total Results	Filters and Inclusion Criteria	Elimination of Duplicates	Valid Results
PEDro	n = 12	n = 2	n = 2	n = 0
Search Strategy 6. Simple Search. “Oral sensorimotor intervention in preterm infants”
Database	Total Results	Filters and Inclusion Criteria	Elimination of Duplicates	Valid Results
PEDro	n = 4	n = 4	n = 0	n = 0

¹ WoS, Web of Science; ² PEDro, Physiotherapy Evidence Database.