Table 5

Comparison of chromosome aberration frequencies (per 100 cells) between the case and control groups

Cases (n = 22)Controls (n = 21)Pa
Chromosome-type CAs
 Gap1.4 ± 1.3b0.6 ± 0.80.01
 Break0.8 ± 1.00.2 ± 0.40.01
 Exchange0.4 ± 0.70.1 ± 0.3NSc
 Break + exchange1.2 ± 1.10.3 ± 0.50.001
 Subtotal2.6 ± 1.70.9 ± 1.0<0.001
Chromatid-type CAs
 Gap2.7 ± 1.22.5 ± 1.6NS
 Break0.6 ± 1.00.9 ± 0.9NS
 Exchange00NS
 Break + exchange0.6 ± 1.00.9 ± 0.9NS
 Subtotal3.3 ± 1.83.4 ± 2.0NS
Tricentrics0.1 ± 0.30NS
Total CAs6.1 ± 2.44.4 ± 2.60.018
Total breaks + exchanges1.8 ± 1.41.2 ± 1.1NS
  • a Mann-Whitney U test.

  • b Mean ± SD.

  • c NS, not significant.