Table 3 Results for Length of Stay (LOS): Crude Odds Ratios (p value from Cochran Mantel Haenszel Chi Square Test of Zero Correlation) and Adjusted Odds Ratios from Multivariate Logistic Regression (p value from partial test on regression coefficient)

< 28

≥ 28

O.R. (95%CI)

p > |χ²

O.R. (95%CI)

p > |χ²

267 (76.3)

83 (23.7)

128 (75.3)

42 (24.7)

1

-

1

-

139 (77.2)

41 (22.8)

0.90 (0.55-1.47)

0.765

1.40 (0.63-3.10)

0.412

21 (25.6)

61 (74.4)

38.10 (16.40-88.20)

< 0.001

10.90 (3.53-33.72)

< 0.001

128 (90.8)

13 (9.2)

1.33 (0.55-3.22)

0.680

0.76 (0.27-2.15)

0.609

118 (92.9)

9 (7.1)

1

-

9 (15.5)

49 (84.5)

120.60 (42.70-340.60)

< 0.001

43.23 (11.63-160.66)

< 0.001

103 (79.2)

27 (20.8)

5.80 (2.40-13.80)

< 0.001

3.01 (1.05-8.68)

0.041

155 (95.7)

7 (4.3)

1

-

1

-

186 (72.1)

72 (27.9)

2.85 (1.44-5.66)

0.003

3.11 (1.05-9.25)

0.041

81 (88.0)

11 (12.0)

1

-

1

-

133 (70.7)

55 (29.3)

1

-

1

-

134 (82.7)

28 (17.3)

0.51 (0.30-0.85)

0.012

0.22 (0.09-0.51)

< 0.001