Table 2. Changes in the parameters before, during, and after exposure to mobile phone calls.

DBP = diastolic blood pressure; SDNN = standard deviations of normal to normal interval; RMSSD = root mean square of successive differences between normal heartbeats; pRR50 = R-R intervals greater than 50 ms; MHR = mean heart rate; TP = total power; LF (%) = low-frequency power percentage; HF (%) = high-frequency power percentage; LF/HF = ratio of low-frequency to high-frequency power; SD1 = Poincare plot standard deviation perpendicular to the line of identity; SD2 = Poincare plot standard deviation along the line of identity

Parameters	Before exposure to mobile phone calls (baseline) (mean ± SD)	During exposure to mobile phone calls (mean ± SD)	After exposure to mobile phone calls (mean ± SD)	P-value
DBP (mmHg)	69.90 ± 8.09	102.40 ± 12.52	98.27 ± 98.27	0.394
SBP (mmHg)	99.33 ± 13.38	72.33 ± 9.93	69.40 ± 8.47	0.440
SDNN (ms)	43.39 ± 50.38	45.96 ± 50.88	47.76 ± 59.22	0.951
RMSSD	33.15 ± 53.25	35.00 ± 57.95	34.97 ± 60.55	0.990
pRR50	6.42 ± 12.27	7.76 ± 14.78	7.76 ± 14.76	0.036*
MHR	88.85 ± 13.82	89.11 ± 2.48	87.53 ± 2.43	0.893
TP	1,516.95 ± 1,598.56	5,413.10 ± 2,0753.25	7,171.50 ± 31,538.51	0.592
LF (%)	31.72 ± 16.20	26.21 ± 13.00	32.63 ± 12.55	0.165
HF (%)	23.41 ± 14.01	22.52 ± 17.70	24.45 ± 16.78	0.857
LF/HF ratio	1.91 ± 1.42	2.09 ± 2.09	2.02 ± 2.02	0.900
SD1 (ms)	23.25 ± 37.70	24.76 ± 40.99	24.88 ± 42.84	0.985
SD2 (ms)	54.67 ± 60.61	59.24 ± 60.03	61.97 ± 72.56	0.907