Table 2.

Median number of months and Standardised Median Time (SMT) from onset to each stage. (A) King’s staging system, (B) MiToS staging system. Patients dead on last observation were recorded and median time from onset to each stage used and repeated for each stage in both staging systems. IQR = Interquartile range.

A)
King’s staging system (n)	Median number of months from onset (IQR)	SMT (IQR)
1 (95)	9.0 (5.4–13.0)	0.33 (0.24–0.46)
2 (49)	18.4 (12.8–22.6)	0.62 (0.51–0.73)
3 (67)	18.9 (12.6–24.6)	0.67 (0.55–0.82)
4 (32)	24.8 (17.4–30.9)	0.86 (0.79–0.95)
5 (95)	27.7 (22.0–34.0)	1.00 (1.00–1.00)
B)
Milano-Torino staging system (n)	Median number of months from onset (IQR)	SMT (IQR)
0 (95)	9.0 (5.4–12.9)	0.33 (0.24–0.46)
1 (94)	16.5 (11.9–22.1)	0.58 (0.49–0.71)
2 (37)	25.0 (20.0–31.7)	0.88 (0.72–0.93)
3 (12)	25.1 (21.0–30.0)	0.93 (0.86–0.97)
4 (2)	27.0 (24.1–29.8)	0.95 (0.95–0.96)
5 (95)	27.7 (22.0–34.0)	1.00 (1.00–1.00)