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Table 5 Comparison of length of stay between the matched pairs (Days)

From: A multi-center nested case-control study on hospitalization costs and length of stay due to healthcare-associated infection

Variable Number of Pairs
(n = 175)
Difference of length of stay in pairs
Median (range)
Statistics
(Z)
P
Classification of the number of hospital beds
 1 29 4.0(−8~ 107) 3.136 0.002
 2 47 4.0(−30~ 52) 2.131 0.033
 3 49 6.0(−56~ 134) 2.716 0.005
 4 50 6.0(−94~ 52) 2.045 0.041
Classification of GDP
 1 19 5.0(−23~ 69) 2.439 0.015
 2 71 3.0(−94~ 134) 1.712 0.087
 3 37 4.0(−30~ 88) 2.106 0.035
 4 48 7.0(−39~ 107) 3.847 0.000
HAIs sites
 Upper respiratory 23 3.0(−21~ 14) − 2.236 0.026
 Blood related 5 6.0(−22~ 20) −0.135 0.893
  Superficial incision 20 10.0(−3~ 107) −3.680 0.000
 Organ lacunar 2 4.5(3~ 6) −1.342 0.180
 Deep incision 6 12.0(−10~ 52) − 1.802 0.072
 Intra-abdominal tissue 1 5.0(5~ 5) / /
 Urinary 23 6.0(−13~ 88) −2.480 0.013
 Skin soft-tissue 12 1.0(−14~ 32) 0.157 0.875
 Lower respiratory 76 5.0(−94~ 134) −2.439 0.015
 Gastrointestinal 6 1.0(−22~ 54) −0.674 0.500
 Other 1 11.0(11~ 11) / /