Possibilities of Interpreting the Night-to-Day Ratio Specified by 24-Hour Blood Pressure Monitoring

Table 3

Classification accordance (%) of night decrease of blood pressure based on the definition night-to-day ratio (D, ND, ED, and R) specified from the quotient of values for 7 days and values for individual days and mode of classification in the individual days in a cohort of 40 patients without exercise.

No	Mean	Night-to-day ratio (%)				Accordance	Mode	Accordance
	7 days	R	ND	D	ED	7 : 1 day	7 days	7 : 1 day
1	ND	14	86			86	ND	86
2	ND	14	57	29		57	ND	57
3	ND	14	29	57		29	D	57
4	ND		86		14	86	ND	86
5	ND		57	43		57	ND	57
6	D		43	57		57	D	57
7	D	14	14	72		72	D	72
8	D		14	57	29	57	D	57
9	D		29	29	42	29	ED	42
10	D		14	57	29	57	D	57
11	D		14	43	43	43	D/ED	43
12	D		29	28	43	29	ED	43
13	D		14	29	57	29	ED	57
14	ED		14		86	86	ED	86
15	ED			57	43	43	D	57
16	ED		14	14	72	71	ED	71
17	ED			50	50	50	ND/D	50
18	ED			43	57	57	ED	57
19	ED		17	33	50	50	ED	50
20	ED			14	86	86	ED	86
21	ND	57	29	14		29	RD	57
22	ND	29	71			71	ND	71
23	ND	14	57	29		57	ND	57
24	ND	14	57	29		57	ND	57
25	ND		57	43		57	ND	57
26	ND	14	43	43		43	ND/D	43
27	D		72	14	14	14	ND	72
28	D		57	29		14	ND	57
29	D	14	14	72		72	D	72
30	D		43	43	14	43	ND/D	43
31	D		29	71		71	D	71
32	D		43	43	14	43	ND/D	43
33	D		29	43	28	43	D	43
34	D		14	57	29	57	D	57
35	D		14	57	29	57	D	57
36	D		29	43	28	43	D	43
37	D			57	43	57	D	57
38	D			57	43	57	D	57
39	D			43	57	43	ED	57
40	ED			29	71	71	ED	71
Mean						53		59
Min-max						29–86		43–86

D: dipper, ND: nondipper, ED: extreme dipper, and R: risers (reverse dipper). Mode: classification based on the highest frequency of category occurrence across individual days. /: mode cannot be clearly specified.