Table 5.

Root mean square error (RMSE) values at different temperature ranges, calculated as the difference between tympanic temperature and forehead surface skin measurements (N = 177) using four pieces of equipment.

	Root mean square error (RMSE)
Temperature Range (oC)	IR Digital Contact Probe (Forehead)	Thermal Imaging Camera	iButton®	FLIR Laser (0.61 m)
0-5	1.31	0.84	7.77	7.99
5.1–10	1.30	0.97	8.59	6.89
10.1–15	1.08	0.81	7.32	6.19
15.1–20	0.94	0.87	6.91	5.27
20.1–25	0.66	0.85	6.86	4.37
25.1–45	0.67	0.90	6.36	3.63
Overall	1.04	0.86	7.31	5.72