Do women reduce the gap to men in ultra-marathon running?

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Table 4 The number of women (W) and men (M) for each age group and race duration

Age group	6 h			12 h			24 h			48 h			72 h			144 h			240 h			Total
Age group	W	M	W + M	W	M	W + M	W	M	W + M	W	M	W + M	W	M	W + M	W	M	W + M	W	M	W + M	W	M	W + M
–	596	2042	2638	429	1163	1592	447	1764	2211	16	64	80	0	6	6	21	74	95				1509	5022	6622
<15	8	19	27	17	30	47	31	59	90	0	4	4	1	3	4	0	3	3				57	118	175
15–19	20	73	93	37	99	136	25	81	106	2	4	6	0	1	1	0	2	2				84	260	344
20–24	71	261	332	124	312	436	85	404	489	14	58	72	0	4	4	2	45	47	0	6	6	296	1090	1386
25–29	222	627	849	306	735	1041	259	940	1199	64	155	219	5	11	16	49	114	163	17	20	37	922	2602	3524
30–34	399	1273	1672	516	1353	1869	477	1965	2442	100	343	443	5	20	25	74	223	297	27	32	59	1598	5209	6807
35–39	630	2212	2842	659	2135	2794	862	3535	4397	174	498	672	13	25	38	108	325	433	28	43	71	2474	8773	1,1247
40–44	853	3171	4024	948	2901	3849	1342	5073	6415	221	651	872	7	45	52	147	405	552	31	28	59	3549	12,274	15,823
45–49	915	3420	4335	972	2971	3943	1369	5507	6876	265	696	961	24	51	75	149	401	550	16	34	50	3710	13,080	16,790
50–54	617	2916	3533	719	2369	3088	947	4345	5292	168	597	765	18	80	98	78	400	478	3	29	32	2550	10,736	13,286
55–59	331	1755	2086	383	1615	1998	576	2655	3231	91	429	520	13	67	80	46	240	286	2	14	16	1442	6775	8217
60–64	157	1031	1188	176	925	1101	276	1543	1819	56	245	301	10	56	66	25	162	187	10	17	27	710	3979	4689
65–69	56	518	574	101	528	629	108	853	961	31	138	169	2	36	38	21	86	107	9	5	14	328	2164	2492
70–74	11	184	195	35	268	303	69	465	534	6	78	84	0	31	31	8	64	72	2	3	5	131	1093	1224
75–79	5	50	55	14	96	110	24	107	131	1	28	29	0	11	11	1	18	19				45	310	355
80–84	0	6	6	2	26	28	3	32	35	0	13	13	0	2	2	0	8	8				5	87	92
85–89				1	7	8	1	14	15	0	2	2										2	23	25
90–94				0	2	2	4	4	8	0	1	1										4	7	11
Total	4891	19,558	24,449	5439	17,535	22,974	6905	29,346	36,251	1209	4004	5213	98	449	547	729	2570	3299	145	231	376	19,416	73,693	93,109