Table 5 Factors associated with late first-case start time (n = 530)

Anesthesia related equipment problem

No

Yes

126

350

1

1

9

45

5.0(2.44, 10.23)*

2.16(0.99, 4.75)

0.054

Anesthetists in OR time

≤ 2

2-2.3

44

81

1

1

≥ 2.3

52

166

3.19(2.34, 4.36)*

1.45(0.96, 2.20)

0.07

39

148

3.79(2.67, 5.40) *

1.11(0.68, 1.81)

0.67

Surgeon in OR time

≤ 2

67

95

1

1

2-2.3

54

93

1.72(1.23,2.41)*

1.11(0.70, 1.76)

0.64

≥ 2.3

14

207

14.78(8.61,25.4)*

10.53(5.51,20.11)*

0

Nurse in OR time

≤ 2

87

228

1

1

2-2.3

39

134

3.44(2.41,4.91)*

0.72(0.43,1.22)

0.22

≥ 2.3

9

33

3.67(1.75,7.66)*

1.05(0.45,2.47)

0.9

Patient arrival time to OR waiting area

≤ 2

2-2.3

96

225

1

1

1

≥ 2.3

28

101

3.61(2.37, 5.48)*

1.28(0.76, 2.17)

0.37

11

69

6.27(3.32,11.85)*

2.5(1.13, 5.14)*

0.023

Abnormal investigation

No

Yes

127

343

1

1

0.037

8

52

6.5(3.09, 13.68)*

2.41(1.06, 5.50)*