Table 2.
Characteristics of the two cohorts.
| Characteristic | Development site (n=14,307) | Validation site (n=21,172) | χ2 or t (df) | P value | |||
| Females, n (%) | 6157 (43.03) | 11,199 (52.90) | 332.20a | <.001 | |||
| Age in years, n (%) | 629.0 (4)b | <.001 | |||||
|
|
<50 | 3165 (22.12) | 5593 (26.42) | N/Ac | N/A | ||
|
|
50-60 | 3251 (22.72) | 3844 (18.16) | N/A | N/A | ||
|
|
60-70 | 3356 (23.46) | 3517 (16.61) | N/A | N/A | ||
|
|
70-80 | 3281 (22.93) | 5039 (23.80) | N/A | N/A | ||
|
|
>80 | 1254 (8.76) | 3179 (15.02) | N/A | N/A | ||
| Length of stay in days, mean (SD) | 8.54 (11.52) | 8.15 (11.28) | 3.14a | .002 | |||
| Medical diagnosis, n (%) | 11,701.0 (7)b | <.001 | |||||
|
|
Neoplasm | 4639 (32.4) | 4869 (23.00) | N/A | N/A | ||
|
|
Benign | 385 (2.7) | 1066 (5.03) | N/A | N/A | ||
|
|
Circulatory disorder | 5670 (39.6) | 769 (3.63) | N/A | N/A | ||
|
|
Respiratory and gastrointestinal disorders | 655 (4.6) | 5630 (26.60) | N/A | N/A | ||
|
|
Surgical procedure | 517 (3.6) | 2163 (10.22) | N/A | N/A | ||
|
|
Neurological disorder | 998 (7.0) | 263 (1.24) | N/A | N/A | ||
|
|
Infectious disorder | 115 (0.8) | 813 (3.84) | N/A | N/A | ||
|
|
Other | 1328 (9.3) | 5599 (26.45) | N/A | N/A | ||
| Presence of secondary diagnosis, n (%) | 14,242 (99.6) | 13,421 (63.40) | 6497.45a | <.001 | |||
| Korean Patient Classification Systemd , n (%) | 52.8 (4)b | <.001 | |||||
|
|
Group 1 | 227 (1.59) | 377 (1.78) | N/A | N/A | ||
|
|
Group 2 | 8197 (57.29) | 11,349 (53.60) | N/A | N/A | ||
|
|
Group 3 | 3898 (27.25) | 5630 (26.59) | N/A | N/A | ||
|
|
Group 4 | 1627 (11.37) | 1332 (6.29) | N/A | N/A | ||
|
|
Groups 5 and 6 | 262 (1.83) | 0 (0) | N/A | N/A | ||
| Number of medications daily, mean (SD) | 2.5 (6.8) | 18.6 (9.9) | −1835.04a | <.001 | |||
| Total number of medications, mean (SD) | 24.4 (75.7) | 172.3 (317.7) | −63.07a | <.001 | |||
| Fall events | 4.7 (1)b | .09 | |||||
|
|
One | 231 (1.61) | 284 (1.34) | N/A | N/A | ||
|
|
Multiple | 7 (0.05) | 8 (0.04) | N/A | N/A | ||
aχ2.
bt (df).
cN/A: not applicable.
dGroup 1 has the lowest nursing needs, while group 6 has the highest nursing needs.