Table 2.
Example of search string in Ovid MEDLINE (R).
| Search Words and Boolean Operators | Number of Records | |
|---|---|---|
| 1 | Aged/ or “Aged, 80 and over”/ or geriatrics/ | 3,278,004 |
| 2 | (old or older or geriatric* or elderly or frail or frailty or geriatric or aged or elder or nursing homes).ti. | 426,409 |
| 3 | Health Services for the Aged/ | 18,010 |
| 4 | 1 or 2 or 3 | 3,462,691 |
| 5 | ((humanoid or human or mobile or assistive or intelligent or emotional or therapeutic or service) adj2 (robot or robots or robotic*)).mp. [mp = title, abstract, original title, name of substance word, subject heading word, floating sub-heading word, keyword heading word, organism supplementary concept word, protocol supplementary concept word, rare disease supplementary concept word, unique identifier, synonyms] | 3522 |
| 6 | 4 and 5 | 252 |
| 7 | (old or older or geriatric* or elderly or frail or frailty or geriatric or aged or elder or nursing homes).ti,ab. | 2,174,500 |
| 8 | 1 or 3 or 7 | 4,791,186 |
| 9 | 5 and 8 | 384 |