Table 3.
Characteristics of patients and nursing records in the learning data set and test data set for prediction of falls.
| Entire data set | Total | Fallers | Nonfallers | P valuea | ||
| Learning data set |
|
|
|
|
||
|
|
Patients, n (% of total) | 371 (100) | 167 (45.0) | 204 (55.0) | —b | |
|
|
Gender, n (% of total) |
|
|
|
— | |
|
|
|
Female | 159 (100) | 78 (49.1) | 81 (50.1) |
|
|
|
|
Male | 212 (100) | 89 (42.0) | 123 (58.0) |
|
|
|
Age (years), mean (SD) | 67.0 (17.0) | 73.4 (12.9) | 61.7 (18.1) | <.001 | |
|
|
Nursing records, n | 12,619 | 9099 | 3520 | — | |
|
|
Nursing records per patient, mean (SD) | 45.4 (41.9) | 66.4 (45.3) | 28.2 (29.3) | <.001 | |
|
|
Nursing record lengthc, mean (SD) | 4879.1 (2212.3) | 5559.4 (1961.9) | 4323.8 (2090.9) | <.001 | |
| Test data set |
|
|
|
|
||
|
|
Patients, n (% of total) | 372 (100) | 168 (45.2) | 204 (54.8) | — | |
|
|
Gender, n (% of total) |
|
|
|
— | |
|
|
|
Female | 183 (100) | 78 (42.6) | 105 (57.4) |
|
|
|
|
Male | 189 (100) | 90 (47.6) | 99 (52.4) |
|
|
|
Age (years), mean (SD) | 67.1 (17.1) | 73.2 (13.8) | 62.1 (18.1) | <.001 | |
|
|
Nursing records, n | 12,526 | 9813 | 2713 | — | |
|
|
Nursing records per patient, mean (SD) | 45.2 (45.1) | 69.8 (52.6) | 25.0 (23.0) | <.001 | |
|
|
Nursing record length,c mean (SD) | 4739.6 (2127.5) | 5522.9 (2005.8) | 4094.5 (2009.1) | <.001 | |
aWelch t test between fallers and nonfallers used.
bNot applicable.
cNumber of Japanese or Chinese characters.