Table 2

Frequencies of chromosome aberrations for each groups by age, gender, smoking, medical history and work duration

(A) Dicentric chromosomes
Whole-HRCBC-HRTLD-HRControls
nDicentricsp ValuenDicentricsp ValuenDicentricsp ValuenDicentricsp Value
Total†2974.14±0.32**566.93±1.35**#2413.49±0.21**1201.33±0.13
Age (years)†
 <401153.69±0.39**0.134294.55±1.03**0.013863.40±0.38**0.324841.17±0.130.044
 ≥401824.43±0.45**279.48±2.51**##1553.55±0.26**361.72±0.27
Gender†
 Female43.50±2.260.49843.50±2.260.1830––431.33±0.220.862
 Male2934.17±0.32**527.19±1.44**##2413.49±0.21**771.34±0.16
Smoking habits†
 Never-smokers1473.97±0.38**0.199326.72±1.24**##0.8941153.21±0.32**0.101751.28±0.150.694
 Ever-smokers1504.31±0.50**247.21±2.73**1263.75±0.29**451.42±0.23
Medical exposure†
 Never-CT2234.02±0.39**0.059396.69±1.83**#0.1831843.46±0.26**0.226891.06±0.12<0.001
 Ever-CT744.52±0.50*177.47±1.58**#573.61±0.37*312.13±0.29
Duration of works (years)‡
0–10944.09±0.390.909264.04±0.690.063684.10±0.470.221
11–201244.32±0.641511.73±4.42#1093.30±0.32
>20764.00±0.46147.00±1.87#623.24±0.32
(B) Chromosome 1, 2 and 4 translocations
Whole-HRCBC-HRTLD-HRControls
n1, 2, 4-translocationsp Valuen1, 2, 4-translocationsp Valuen1, 2, 4-translocationsp Valuen1, 2, 4-translocationsp Value
Total†2978.34±0.45**5610.36±1.74**2417.87±0.38**1202.61±0.19
Age (year)†
 <401155.70±0.46**<0.001296.28±1.43**<0.001865.50±0.38**<0.001842.25±0.180.016
 ≥4018210.01±0.65**2714.74±3.08**1559.18±0.52**363.44±0.42
Gender†
 Female45.00±2.380.18145.00±2.380.2060––431.91±0.270.003
 Male2938.38±0.46**5210.77±1.86**2417.87±0.38**773.00±0.24
Smoking habits†
 Never-smokers1478.90±0.66**0.2943211.72±2.06**0.1201158.11±0.60**0.767752.27±0.220.014
 Ever-smokers1507.79±0.62**248.54±3.01*1267.64±0.47**453.18±0.33
Medical exposure†
 Never-CT2238.06±0.50**0.415398.97±2.11**0.0131847.83±0.42**0.736892.11±0.16<0.001
 Ever-CT749.18±1.00**1713.53±3.04**#577.98±0.86*314.03±0.48
Duration of radiation works (year)‡
 0–10945.80±0.45<0.001265.38±0.760.018685.96±0.54<0.001
 11–201248.27±0.761514.47±5.051097.42±0.48
 >207611.78±1.011415.86±3.486210.87±0.94

  • †Mann-Whitney U-test.

  • ‡ANOVA test with Tukey's multiple comparison.

  • *p<0.05, **p<0.001 when compared with the respective control group with Mann-Whitney U-test.

  • #p<0.05, ##p<0.001 when compared with the TLD-HR group with Mann-Whitney U-test.

  • ANOVA, analysis of variance; CBC-HR, complete blood cell count-high risk; TLD-HR, thermoluminescent dosimeter-high risk.