Table 3 Descriptive and statistical tests for heart rate, respiration rate, and LFP/HFP (%) among stage, exposure, and interaction
From: Effects of 60 Hz magnetic fields on teenagers and adults
Heart rate (bpm) | Respiration rate (bpm) | LFP/HFP (%) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Adult | Teenager | Adult | Teenager | Adult | Teenager | |||||||
Sham | Real | Sham | Real | Sham | Real | Sham | Real | Sham | Real | Sham | Real | |
Stage: mean (standard error) | ||||||||||||
I | 78.7 (2.1) | 78.2 (2.1) | 81.9 (1.4) | 80.9 (1.8) | 18.4 (0.4) | 18.4 (0.5) | 17.9 (0.5) | 18.6 (0.5) | 100.0 (0.0) | 100.0 (0.0) | 100.0 (0.0) | 100.0 (0.0) |
II | 78.0 (2.1) | 76.6 (1.9) | 82.0 (1.4) | 80.8 (1.6) | 18.9 (0.4) | 18.2 (0.4) | 18.1 (0.5) | 18.2 (0.4) | 144.9 (11.9) | 156.3 (19.5) | 129.3 (15.3) | 142.4 (16.7) |
III | 76.7 (2.1) | 77.0 (2.0) | 80.7 (1.3) | 80.9 (1.4) | 18.6 (0.4) | 18.5 (0.4) | 18.0 (0.5) | 18.4 (0.4) | 148.0 (16.5) | 175.8 (21.2) | 156.5 (20.4) | 166.5 (22.9) |
IV | 78.3 (2.1) | 76.9 (1.9) | 81.2 (1.4) | 80.6 (1.4) | 19.2 (0.4) | 18.5 (0.4) | 18.5 (0.5) | 18.6 (0.4) | 178.0 (21.8) | 148.2 (9.9) | 177.0 (22.8) | 157.0 (22.9) |
Factor (P-value) | ||||||||||||
Exposure | 0.623 | 0.487 | 0.115 | 0.135 | 0.883 | 0.965 | ||||||
Stage | 0.075 | 0.669 | 0.130 | 0.165 | < 0.001* | < 0.001* | ||||||
Interaction (exposure and stage) | 0.318 | 0.376 | 0.323 | 0.102 | 0.180 | 0.570 | ||||||