. 2021 Aug 20;11:16972. doi: 10.1038/s41598-021-95960-1

Table 4.

Evaluation of one-step-ahead forecast prediction based on root mean square error (RMSE), concordance correlation (CCC), Pearson correlation (r), and accuracy ( $C) b$ ) coefficients between the predict and observed values of a new group with N women whom have $n_{i}$ observed cycles.

N	$n_{i}$	RMSE	CCC			r	$C_{b}$
N	$n_{i}$	RMSE	Est	Lower	Upper	r	$C_{b}$
1029	3	5.2349	0.2213	0.1825	0.2610	0.2953	0.7490
760	4	5.3515	0.2254	0.1710	0.2784	0.2800	0.8048
603	5	5.4332	0.2078	0.1374	0.2760	0.2281	0.9108
434	6	5.5019	0.2102	0.1221	0.2951	0.2182	0.9634
324	7	5.6496	0.2069	0.1015	0.3078	0.2089	0.9905
248	8	6.3264	0.1047	− 0.0190	0.2252	0.1055	0.9928
199	9	6.1774	0.0778	− 0.0602	0.2129	0.0786	0.9901
160	10	5.1351	0.2632	0.1132	0.4015	0.2633	0.9998
124	11	5.1964	0.1421	− 0.0335	0.3093	0.1428	0.9954
99	12	4.8562	0.2713	0.0801	0.4433	0.2726	0.9953
78	13	4.6067	0.1970	− 0.0185	0.3951	0.2028	0.9716