Table 2 The data analysis of ORi equals to zero and accuracy for predicting hypoxemia during OLV at different time points of surgery

Preoxygenation (95% CI)

0.15 (0.1–0.3)

91.9 (84.3–99.5)

40 (26.4–53.6)

75.6 (63.6–87.5)

1.9 (1.9–5.7)

0.9 (0.8–1)

72 (59.6–84.4)

ORIDS5 = 0

(95% CI)

92.3 (84.9–99.6)

81.1 (70.2–.91.9)

63.2 (49.8–76.5)

96.8 (91.9–100)

4.9 (1.1–10.9)

0.1 (0.1–0.2)

84 (73.8–94.2)

ORIDL5 = 0

(95% CI)

69.2 (56.4–82)

83.3 (73–93.7)

81.8 (71.1–92.5)

71.4 (58.9–84)

4.2 (1.4–9.7)

0.4 (0.2–0.5)

76 (64.2–87.8)

OROLV1 = 0

(95% CI)

63.6 (50.3–77)

75 (63–87)

66.7 (53.6–79.7)

72.4 (60–84.8)

2.6 (1.8–6.9)

0.5 (0.3–0.6)

70 (57.3–82.7)

OROLV2 = 0

(95% CI)

65.2 (52–78.4)

70.4 (57.7–83)

68.2 (55.3–81.1)

70.4 (57.7–83)

2.2 (1.9–6.2)

0.5 (0.4–0.6)

69.4 (56.6–82.2)

OROLV5 = 0

(95% CI)

56.5 (42.8–70.3)

66.7 (53.6–79.7)

59.1 (45.5–72.7)

64.3 (51–77.6)

1.7 (0.7–2.7)

0.7 (0.5–0.8)

62 (48.5–75.5)

OROLV10 = 0

(95% CI)

56 (42.2–70)

64 (50.7–77.3)

60.9 (47.3–74.4)

59.3 (50–72.9)

1.6 (0.6–2.6)

0.7 (0.6–0.8)

60 (46.4–73.6)

OROLV15 = 0

(95% CI)

52.2 (38–66.3)

68 (54.8–81.2)

60 (46.1–73.9)

60.7 (46.9–74.5)

1.6 (0.6–2.7)

0.7 (0.6–0.8)

60.4 (46.6–74.3)

OROLV30 = 0

(95% CI)

43.8 (29.7–57.8)

64 (50.4–77.6)

43.8 (29.7–57.8)

64 (50.4–77.6)

1.2 (0.2–2.2)

0.9 (0.8–1)

56.1 (42.1–70.1)

OROLV45 = 0

(95% CI)

40 (23.3–56.7)

72.2 (57–87.5)

54.5 (37.6–71.5)

59.1 (42.3–75.9)

1.4 (0.3–2.7)

0.8 (0.7–1)

57.6 (40.7–74.4)

OROLV60 = 0

(95% CI)

53.3 (35.8–70.9)

68.8 (52.4–85.1)

61.5 (44.4–78.7)

61.1 (43.9–78.3)

1.7 (0.4–3)

0.7 (0.5–0.8)

61.3 (44.1–78.4)

OROLV90 = 0

(95% CI)

50 (25.5–75)

66.7 (43.6–90)

71.4 (49.3–93.6)

44.4 (20.1–68.8)

1.5 (0.2–4.3)

0.8 (0.5–0.9)

56.3 (31.9–80.6)