Table 3.

Correlations Between Repeated Fatigue Measures Over 15 Months

	Baseline	3 months	6 months	9 months	12 months	15 months
Fatigue intensity
Baseline	1.00
3 months	0.72	1.00
6 months	0.67	0.73	1.00
9 months	0.63	0.73	0.75	1.00
12 months	0.70	0.76	0.78	0.79	1.00
15 months	0.70	0.73	0.78	0.80	0.85	1.00
Impact of fatigue on functioning
Baseline	1.00
3 months	0.67	1.00
6 months	0.71	0.65	1.00
9 months	0.65	0.63	0.71	1.00
12 months	0.72	0.65	0.74	0.72	1.00
15 months	0.72	0.70	0.78	0.69	0.80	1.00