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Table 1 Characteristics of the study population

From: No association between TGF-β1 polymorphisms and risk of nasopharyngeal carcinoma in a large North African case-control study

Characteristics

Cases n (%)

Controls n (%)

P-valuea

Whole sample

384

361

 

Gender

 Male

263 (68.49)

243 (67.31)

0.731

 Female

121 (31.51)

118 (32.69)

 

 Age mean (years)

42.24

43.58

 

Age

  ≤30

101 (26.30)

83 (22.99)

0.295

  >30

283 (73.70)

278 (77.01)

 

Country

 Tunisia

190 (49.48)

172 (47.65)

0.852

 Morocco

180 (46.88)

174 (48.20)

 

 Algeria

14 (3.65)

15 (4.16)

 

TNM stageb

 I

0

-

 

 II

13 (4.55)

-

 

 III

65 (22.73)

-

 

 IV

208 (72.73)

-

 
  1. a P-value of χ2 comparing cases and controls
  2. bTNM was missing for 98 cases out of 384