Table 2 Surgical and anesthetic data

Left lung surgery (n (%))

10 (33.3%)

13 (43.3%)

0.585

0.597

Surgical procedure (n (%))

0.067

1.000

 Segmentectomy

14 (46.7%)

15 (50%)

 Lobectomy

16 (53.3%)

15 (50%)

Sufentanil dose during surgery (μg/kg)

0.43 ± 0.11

0.54 ± 0.10

− 4.457

<0.001*

Remifentanil dose during surgery (μg/kg·min)

0.10 ± 0.05

0.12 ± 0.04

0.050

0.960

Duration of anesthesia (min)

142 ± 42

166 ± 56

− 1.772

0.081

Duration of surgery (min)

109 ± 38

131 ± 54

− 1.676

0.099

Extubation time (min)

20 (10, 20.75)

20 (13.75, 30)

− 0.818

0.414

Patients received ≥ two doses of vasopressors (n (%))

5 (8.1%)

6 (20%)

6.107

0.411

Resting pain score at 48 h

0 (0, 1.25)

1 (0, 1.25)

− 1.168

0.243

Coughing pain score at 48 h

3 (3, 3)

3 (2, 4)

− 0.775

0.439

Cumulative equivalent sufentanil dose at 48 h (μg/kg)

0.52 ± 0.13

0.69 ± 0.22

− 3.771

0.001*

Chest tube drainage (days)

2.5 (2, 3)

2.5 (2, 3)

− 0.219

0.827

Hospital stay (days)

3.5 (3, 4)

4 (3, 5)

− 0.237

0.813

Incidence of DNR (n (%))

9 (30%)

15 (50%)

2.500

0.187

 DNR in middle-aged

9/18 (50%)

13/15 (86.7%)

 DNR in low level education

6/10 (60%)

13/15 (86.7%)

 Detection (log10 ms)

2.71 ± 0.13

2.69 ± 0.12

− 1.064

0.292

 Identification (log10 ms)

2.88 ± 0.12

2.88 ± 0.13

− 1.249

0.217

 Detection (log10 ms)

2.80 ± 0.13

2.83 ± 0.15

− 1.064

0.292

 Identification (log10 ms)

2.93 ± 0.13

2.97 ± 0.11

− 1.249

0.217

 One-card learning (arcsine accuracy)

0.91 ± 0.09

0.90 ± 0.08

0.173

0.864

 One-back memory (arcsine accuracy)

1.17 ± 0.22)

1.10 ± 0.26

1.038

0.305