Table 1 Characteristics of the included studies

From: CFTR variants and renal abnormalities in males with congenital unilateral absence of the vas deferens (CUAVD): a systematic review and meta-analysis of observational studies

Author

Country /ethnicity

CAVD diagnosis

Genotyping method

Study type

Case of RA (event/total)

Included cases

Control

     

CUAVD

CBAVD

CUAVD

CBAVD

 

Yang et al. (2015)24

Chinese

CSC; excluding CF

Whole exon/flanking sequence

Case control

1/6

1/11

5

10

50 NC

Chiang et al. (2013)25

Taiwanese

CSC; excluding CF and RA;

Whole exon/flanking sequence

Cross-sectional

1/2

0/12

1

12

NA

Schwarzer and Schwarz (2012)13

German

CSC; excluding CF and RA

Common variants screening

Cross-sectional

5/13

5/110

8

105

NA

Sharma et al. (2009)26

Indian

CSC; excluding CF and CFAS and RA

Whole exon/flanking sequence; 5T and TG test

Case control

3/10

1/40

7

39

50 NC

Radpour et al. (2007)27

Iranian

CSC; excluding CF and RA

Whole exon/flanking sequence; 5T and TG test

Case control

NA

0/112

7

112

84 NC

Danziger et al. (2004)29

U: Hispanic B: nine Asian or Asian-Indian, three Caucasian, and one Hispanic

CSC; excluding CF and RA

Common variants screening

Cross-sectional

0/1

2/13

1

11

2 OA

Grangeia et al. (2004)28

Portuguese

CSC; excluding CF and RA

Whole exon/flanking sequence; 5T test

Case control

0/4

3/34

4

31

114 NC; 16 OAZ and 23 NOAZ

Kolettis and Sandlow (2002)31

American

CSC; excluding CF and RA

Common variants screening

Cross-sectional

4/11

NA

6

NA

NA

Robert et al. (2002)30

French

CSC; excluding CF and RA

Common variants screening; 5T test

Cross-sectional

1/7

2/40

6

38

NA

Attardo et al. (2001)33

Italian

CSC; excluding CF and RA

Common variants screening; 5T test

Cross-sectional

0/1

3/37

1

34

NA

Larriba et al. (2001)32

Spanish

CSC; excluding CF

Whole exon/flanking sequence 5T test

Cross-sectional

NA

NA

4

16

30 Non-CAVD

Casals et al. (2000)14

Spanish

CSC; excluding CF and RA

Whole exon/flanking sequence; 5T test

Case control

10/24

6/110

14

104

200 NC

Jézéquel et al. (2000)35

French

CSC; excluding CF and CFAS; RAU

Whole exon/flanking sequence; 5T test

Cross-sectional

NA

NA

3

37

7 OA

Zeng et al. (2000)34

Chinese

CSC

Common variants screening

Cross-sectional

NA

NA

15

NA

NA

Castellani et al. (1999)36

Italian

CSC; excluding CF and RA

Common variants screening; 5T test

Cross-sectional

0/3

2/39

3

37

NA

Boucher et al. (1999)37

French

CSC; excluding CF and RA

Common variants screening

Cross-sectional

0/2

1/12

2

11

39 Non-CAVD; 37 oligozoospermia

Dörk et al. (1997)38

German with a few Austrian, Portuguese, Turkish, and Vietnamese

CSC; excluding CF and RA

Whole exon/flanking sequence; 5T test

Cross-sectional

0/5

9/101

5

92

NA

Schlegel et al. (1996)16

American

CSC; excluding CF and RA

Common variants screening

Cross-sectional

5/19

6/53

12

52

NA

Casals et al. (1995)40

Spanish

CSC; excluding CF

Common variants screening

Cross-sectional

NA

NA

6

28

NA

Chillón et al. (1995)1

European (Belgian, French, Spanish) and American

CSC; excluding CF and CFAS; RAU

Whole exon/flanking sequence; 5T test

Case control

NA

NA

12

102

46 NC 10 non-CAVD

Jarvi et al. (1995)39

Canadian

CSC; excluding CF

Common variants screening; 5T test

Cross-sectional

NA

NA

2

25

17 OAZ; 18 SF

Mickle et al. (1995)7

American

CSC; excluding CF and RA

Common variants screening

Cross-sectional

5/21

NA

16

NA

NA

Culard et al. (1994)41

French including one Turkish

CSC; excluding CF; RAU

Whole exon/flanking sequence

Cross-sectional

NA

NA

1

8

NA

  1. CAVD congenital absence of the vas deferens, CBAVD congenital bilateral absence of the vas deferens, CF cystic fibrosis, CFAS CF-related atypical symptoms that comprise mainly minor pulmonary and gastrointestinal, CSC CUAVD diagnosis conformed to the standardized criteria, CUAVD congenital unilateral absence of the vas deferens, NA not available, NC normal controls, NOAZ nonobstructive azoospermia, non-CAVD noncongenital absence of the vas deferens infertility, OAZ obstructive azoospermia, RA renal abnormalities that include mainly uni-/bilateral renal agenesis, RAU renal abnormality information was unavailable, SF spermatogenic failure