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Table 1 Main characteristics of study population

From: Risk of lung cancer among women in relation to lifetime history of tobacco smoking: a population-based case-control study in France (the WELCA study)

 

Cases N = 716 (%)

Controls N = 757 (%)

p

AGE

  < 50

95 (13.3)

86 (11.4)

 

  [50–60[

196 (27.4)

175 (23.1)

 

  [60–70[

309 (43.2)

353 (46.6)

 

  ≥ 70

116 (16.2)

143 (18.9)

0.10

mean (SD)

60.9 (9.4)

61.9 (9.5)

0.79

AREA OF RESIDENCE (‘Département’)

 75 Paris

289 (40.4)

315 (41.6)

 

 77 Seine-et-Marne

27 (3.8)

22 (2.9)

 

 78 Yvelines

32 (4.5)

30 (4.0)

 

 91 Essonne

24 (3.4)

24 (3.2)

 

 92 Hauts-de-Seine

116 (16.2)

124 (16.4)

 

 93 Seine-Saint-Denis

84 (11.7)

73 (9.6)

 

 94 Val-de-Marne

130 (18.2)

156 (20.6)

 

 95 Val-d’Oise

14 (2.0)

13 (1.7)

0.78

EDUCATION

 University

336 (47.1)

372 (49.1)

 

 High school

117 (16.4)

141 (18.6)

 

 Middle school

199 (27.9)

211 (27.9)

 

 Elementary school or less

62 (8.7)

33 (4.4)

0.01

BMI 2 years BEFORE THE INTERVIEW (kg/m2)

  < 18.5

62 (8.7)

37 (4.9)

 

  [18.5–25.0[

402 (56.2)

350 (46.3)

 

  [25.0–30.0[

161 (22.5)

207 (27.4)

 

  ≥ 30.0

90 (12.6)

162 (21.4)

< 0.001

mean (SD)

24.2 (5.3)

25.8 (5.7)

0.03

HISTOLOGIC TYPES

Cases N (%)

  

 Adenocarcinoma

514 (71.8)

 

 Squamous cell carcinoma

67 (9.4)

 

 Large cell carcinoma

28 (3.9)

 

 Small cell carcinoma

88 (12.3)

 

 Others

19 (2.6)

 
  1. Abbreviations: BMI body mass index; SD standard deviation
  2. Descriptive analysis were drawn using the Student test for continuous variables and the X2 Pearson test for categorical variables