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

Table 2

Classification accordance (%) of night decrease of blood pressure based on the definition night-to-day ratio (D, ND, ED, 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 healthy subjects with 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		57	43		57	ND	57
2	D		50	50		50	ND/D	50
3	D		29	71		71	D	71
4	D	14	15	57	14	57	D	57
5	D	14	15	57	14	57	D	57
6	D		29	71		71	D	71
7	D	14		71	15	71	D	71
8	D	14	15	71		71	D	71
9	D		29	71		71	D	71
10	D		29	71		71	D	71
11	D		29	57	14	57	D	57
12	D		14	57	29	57	D	57
13	D		14	71	14	71	D	71
14	D			100		100	D	100
15	D		14	71	14	71	D	71
16	D		14	86		86	D	86
17	D		29	43	28	43	D	43
18	D		14	57	29	57	D	57
19	D		14	43	43	43	D/ED	43
20	D			29	71	29	ED	71
21	ND	43	43	14		43	ND/R	43
22	ND	29	57	14		57	ND	57
23	ND	33	50	17		50	ND	50
24	ND	57		43		0	R	57
25	ND	29	43	28		43	ND	43
26	ND	29	43	14	14	43	ND	43
27	ND	29	29	29	13	29	D/ND/R	29
28	ND		86	14		86	ND	86
29	ND		57	29	14	57	ND	57
30	ND		57	29	14	57	ND	57
31	D	29	13	29	29	29	D/ED/R	29
32	D		57	14	29	14	ND	57
33	D		43	29	28	29	ND	43
34	D		14	86		86	D	86
35	D		14	71	15	71	D	71
36	D		43	43	14	43	D/ND	43
37	D		14	86		86	D	86
38	D		29	43	28	43	D	43
39	D		28	43	29	43	D	43
40	ED			43	57	57	ED	57
Mean						56		60
Min-max						0–100		43–100

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.