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Table 1 Patients’ characteristics, grouped based on the operator performing the oocyte retrieval

From: Assessment of operator performance during oocyte retrievals: residents’ learning curve and continuous monitoring of senior physicians

 

Operator

P value

Resident

Mixeda

Senior physician

n

315

139

220

 

Age (years)

33.5 +/− 4.64

32.5 +/−  4.8

34.1 +/−  4.4

0.005

Body Mass Index (kg/m2)

23.9 +/− 5.45

24.2+/− 5.3

24.1+/−  5.3

0.90

Smoking status

   

0.58

 Non-smoker

187 (66.8)

77 (66.4)

130 (67.4)

 

 Smoker

59 (21.1)

26 (22.4)

48 (24.9)

 

 Former smoker

34 (12.1)

13 (11.2)

15 (7.8)

 

Baseline E2 (pg/mL)

44.4 +/−  93.3

37.5 +/−  24.3

40.1 +/−  35.0

0.43

Baseline FSH (UI/L)

7.4 +/−  3.5

6.8 +/−  3.1

7.6 +/− 4.1

0.08

Baseline LH (UI/L)

6.4 +/−  17.9

5.3 +/−  3.5

5.4 +/−  3.2

0.62

Baseline AMH (ng/mL)

2.78 +/− 3.07

3.4 +/− 4.4

2.9 +/−  3.5

0.34

Antral Follicle Count

18.6 +/−  11.1

21.3 +/−  12.2

17.9 +/− 11.3

0.04

Etiology of infertilityb

 Endometriosis

44 (14.0)

24 (17.3)

27 (12.3)

0.41

 Tubal factor

11 (4.1)

3 (2.6)

8 (4.1)

0.76

 Oligoasthenoteratospermia

183 (58.1)

73 (52.5)

90 (41.3)

0.001

 Unexplained

66 (20.9)

34 (46.8)

70 (31.8)

0.09

Ovulation disorders

   

0.46

 • Ovarian insufficiency

40 (12.7)

12 (8.6)

34 (15.4)

 

 • PCOSc

45 (14.3)

21 (15.1)

30 (13.6)

 
  1. Data are expressed as n (percentage) or mean +/− standard deviation
  2. aRetrieval performed during the learning period: one side is aspirated by the resident and the other side by the senior physician
  3. bSome couples had several causes of infertility
  4. cPolycystic Ovary Syndrome