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Table 1 Demographic and clinical characteristics of study population in both groups

From: Lung injury induced by different negative suction pressure in patients with pneumoconiosis undergoing whole lung lavage

Variables Group H (n = 13) Group L (n = 11) P
Male (%) 13(100.0) 11(100.0) 1
Age (years) 48.5 ± 5.9 45.2 ± 6.7 0.21
BMI 25.4 ± 2.1 23.6 ± 4.0 0.18
Stage of pneumoconiosis I and II (%) 8(61.5) 9(81.8) 0.39
Stage of pneumoconiosis III (%) 5(38.5) 2(18.2) 0.39
Smoke history (%) 9(69.0) 6(54.5) 0.68
Dust exposure time(year) 17.8 ± 9.8 16.0 ± 11.0 0.72
  1. Measurement data are expressed as means ± SD. Counting data were expressed as numbers and percentages. *was statistically significant compared with Group H, P < 0.05
  2. Group H, high negative suction pressure group; Group L, low negative suction pressure group
  3. BMI body mass index