| Age group | Statistical test | |||
---|---|---|---|---|---|
0– | 1– | 3– |  >  = 5 | ||
Risk group (cases [%]) | |||||
 None | 187 (46.98) | 241 (75.31) | 176 (86.70) | 170 (83.33) | χ2 = 144.933, p < 0.01 |
 Yes | 211 (53.02) | 79 (24.69) | 27 (13.30) | 34 (16.67) | |
Length of stay (days) | 11.390 (8.0, 16.0) | 9.000 (5.5, 12.0) | 7.580 (5.0, 11.7) | 7.000 (5.0, 10.5) | H = 78.085, p < 0.01 |