Table 1 Demographic characteristics of lung cancer cases and non-cases

From: Possible pro-carcinogenic association of endotoxin on lung cancer among Shanghai women textile workers

 

Cases ( n =1456)

Non-cases ( n = 3022)

Characteristics

No.

%

No.

%

Year of birth, n (%)

1925–1929

512

(36.0)

884

(29.6)

1930–1934

473

(33.2)

890

(29.3)

1935–1939

173

(12.2)

340

(11.3)

1940–1944

54

(3.8)

145

(4.8)

1945–1949

88

(6.2)

267

(8.8)

1950–1954

77

(5.4)

304

(10.0)

1955–1958

46

(3.2)

189

(6.3)

Years worked, n (%)

<10

35

(2.5)

110

(3.4)

⩾10 to <20

284

(20.0)

568

(18.8)

⩾20 to <30

600

(42.2)

1263

(41.8)

⩾30

504

(35.4)

1088

(36.0)

Smoking status, n (%)

Never

1262

(88.7)

2882

(95.4)

Ever

161

(11.3)

140

(4.6)

Parity, n (%)

Nulliparous

76

(5.3)

122

(4.0)

1 live birth

233

(16.4)

707

(23.3)

⩾2 live births

1114

(78.3)

2193

(72.7)

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