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Table 1 Subject characteristics – Occupational medical evaluation group

From: A retrospective study of two populations to test a simple rule for spirometry

 

Normal

(n = 532)

Obstructed

(n = 815)

Restricted

(n = 701)

Significance

FEV1 % predicted [mean (SD)]

94.3 (8.8)

53.6 (16.3)

70.7 (11.6)

P < 0.001

FVC % predicted [mean (SD)]

92.4 (8.5)

70.4 (15.7)

67.7 (10.5)

P < 0.001

FEV1/FVC [mean (SD)]

77.0 (4.4)

56.3 (10.6)

78.3 (5.5)

P < 0.001

Gender [n (%) Male]

513 (99.4)

795 (97.6)

674 (96.2)

0.1646

Current smoker [n (%)]

129 (24.3)

269 (33.0)

189 (27.0)

P < 0.001

Obesity [n (%)]

191 (35.9)

211 (25.9)

339 (48.4)

P < 0.001

BMI [mean (SD)]

29.3 (4.4)

27.9 (5.0)

30.5 (5.1)

P < 0.001

Age [mean (SD)]

62.0 (9.1)

65.8 (8.5)

64.2 (9.2)

P < 0.001

Pack years [mean (SD)]

46.0 (24.9)

58.8 (30.7)

51.9 (27.8)

P < 0.001