Table 1.

Subject number, physical fatigue score, mental fatigue score, and CFS-related score.

		Subject number	Physical fatigue score	Mental fatigue score	CFS-related score
11 yr	Total	421	5.0 [4.7–5.2]†	3.5 [3.2–3.8]	5.2 [4.8–5.5]
	Male	204	4.9 [4.5–5.3]	3.3 [2.9–3.8]	4.9 [4.4–5.3]*
	Female	217	5.0 [4.6–5.4]	3.6 [3.2–4.0]	5.5 [4.9–5.9]
12 yr	Total	226	5.5 [5.1–5.8]	4.0 [3.6–4.4]	5.0 [4.6–5.5]
	Male	109	5.7 [5.1–6.2]	4.0 [3.5–4.6]	5.1 [4.4–5.7]
	Female	117	5.3 [4.8–5.8]	3.9 [3.4–4.4]	5.0 [4.5–5.6]
14 yr	Total	243	6.5 [6.2–6.9]	6.0 [5.6–6.4]	6.9 [6.5–7.4]
	Male	118	6.3 [5.8–6.7]	5.8 [5.2–6.3]	6.1 [5.4–6.7]**
	Female	125	6.8 [6.3–7.3]	6.2 [5.7–6.8]	7.8 [7.2–8.4]
16 yr	Total	335	6.6 [6.3–6.9]	6.0 [5.7–6.3]	6.5 [6.1–6.8]
	Male	160	6.5 [6.1–7.0]	5.7 [5.2–6.3]	6.0 [5.6–6.5]**
	Female	175	6.7 [6.3–7.0]	6.3 [5.9–6.7]	6.8 [6.4–7.3]
All	Total	1225	5.8 [5.6–6.0]	4.8 [4.6–4.9]	5.8 [5.6–6.0]
	Male	591	5.8 [5.5–6.0]	4.6 [4.3–4.9]	5.4 [5.2–5.7]**
	Female	634	5.9 [5.6–6.1]	4.9 [4.7–5.2]	6.2 [5.9–6.5]

^†Numbers in parentheses show 95% CI.

Differences between male and female subjects at each age are: *P < .05, **P < .01, no marks; not significant