The Korean Journal of Clinical Laboratory Science : eISSN 2288-1662 / pISSN 1738-3544

Table. 1.

Table. 1.

The cytotoxicity of lead acetate (LA) by XTT assay

Group N Sleep latency (min) Sleep efficiency (%) Stage N1 (%) Stage N2 (%) Stage N3 (%) Stage R (%) Number of sleep spindles/h Average frequency of sleep spindles (Hz)
M SD U (P) M SD U (P) M SD U (P) M SD U (P) M SD U (P) M SD U (P) M SD U (P) M SD U (P)
BDZ users 30 23.12 37.68 406.5
(0.520)
80.43 12.97 414
(0.594)
15.03 8.84 379.5
(0.296)
56.23 11.74 238**
(0.002)
0.47 1.88 281**
(0.002)
12.80 7.43 369.5
(0.233)
29.54 19.72 376.5
(0.277)
13.38 1.17 182.5***
(0.000)
Non-users 30 17.22 37.05 76.53 17.74 16.27 6.53 45.67 12.96 2.67 4.03 14.17 5.20 21.94 10.32 11.66 1.54
Short-term use 17 15.12 24.08 63*
(0.047)
82.88 14.56 69.5
(0.086)
14.88 7.42 103.5
(0.769)
57.29 12.65 96.5
(0.557)
0.82 2.48 91
(0.117)
12.18 7.06 100.5
(0.675)
26.20 15.62 94.5
(0.503)
13.39 1.26 109
(0.950)
Long-term use 13 33.57 49.49 77.38 10.29 15.23 10.74 54.85 10.76 0 0 13.62 8.09 33.91 24.03 13.37 1.11
Older group 9 27.24 38.90 85.5
(0.684)
73.33 13.56 51*
(0.049)
17.00 7.98 70
(0.267)
48.33 11.64 44.5*
(0.023)
0 0 81
(0.241)
12 6.04 90.5
(0.856)
21.33 9.32 71.5
(0.293)
13.45 1.20324 89
(0.803)
Younger group 21 21.35 37.98 83.57 11.73 14.19 9.24 59.62 10.27 0.67 2.24 13.14 8.06 33.06 22.04 13.35 1.19523
Older and short-term use 4 27.17 43.93 7
(0.462)
76.25 19.19 7
(0.462)
19.50 11.38 7
(1.0)
48.50 14.70 9
(0.806)
0 0 - 11.75 7.04 10
(1.0)
26.17 9.63 5
(0.221)
13.95 0.98 6
(0.319)
Older and long-term use 5 27.3 39.73 71.0 8.74 15.0 4.35 48.20 10.42 0 0 12.20 5.97 17.46 7.88 13.06 1.31

*P<0.05, **P<0.01, ***P<0.001.

Abbreviations: BDZ, benzodiazepine; M, mean; SD, standard deviation; U, Mann-Whitney U.

Korean J Clin Lab Sci 2021;53:333-41 https://doi.org/10.15324/kjcls.2021.53.4.333
© 2021 Korean J Clin Lab Sci