Table 1: Average estimates of mitotic activity in breast cancers (as SMI and MAI) in different subgroups of the 130 Libyan female breast cancer patients.

GroupNo. of patientsSMI (SD) valueMAI (SD) value

Whole material13032.1 (20.9)27.3 (18.5)

Age groups 0.020.001
 <404931.6 (14.0)27.8 (17.3)
 40–493224.3 (19.2)17.4 (14.6)
 ≥504937.6 (26.0)33.2 (20.0)
Menopausal status0.010.008
 Premenopausal
 Postmenopausal
80
50
28.5 (16.6)
37.7 (25.7)
23.9 (17.0)
32.7 (19.8)
Lymph node (LN) status0.0030.035
 LN− 27 21.5 (13.0)20.6 (19.7)
 LN+10334.8 (21.8)29.0 (17.9)
Histological grade0.010.003
 11014.9 (9.2)12.8 (9.6)
 27032.1 (19.3)25.4 (17.1)
 35035.4 (23.3)32.7 (20.0)
Histological type0.70.8
 Invasive  ductal carcinoma9532.7 (21.2)26.9 (18.6)
 Invasive  lobular carcinoma1332.9 (16.4)30.1 (17.1)
 Other types2228.7 (27.7)27.7 (19.7)