Table 1 Characteristics of the Epi and IV-PCA cohorts

Number

174

82

256

Age (years)

67 ± 13

68 ± 12

68 ± 13

Male/female

112/62

32/50

144/112

Height (cm)

159 ± 9

153 ± 9

158 ± 9

Weight (kg)

59 ± 10

58 ± 10

59 ± 10

Smoking status (smokers/non-smokers)

35/139

10/72

45/211

History of motion sickness (yes/no)

19/155

16/66

35/221

 Abdominal (no laparoscopic)

138

7

145

 Abdominal (laparoscopic)

31

26

57

 Spine

0

19

19

 Upper extremities

0

3

3

 Lower extremities

0

10

10

 Mastectomy

0

11

11

 Thyroidectomy

0

2

2

 Unclassifiable

5

4

9

Duration of surgery (min)

192 ± 122

160 ± 104

182 ± 117

Use of nitrous oxide (used/not used)

62/112

50/32

112/144