Table 3.

The effects of associated factors on the temperature differences calculated with iThermonitor readings minus mercury thermometer readings

Factors	N*	iThermonitor (°C)	Mercury thermometer(°C)	Bias (°C)	95% CI of bias	t	P value†
Readings of mercury thermometers
Hypothermia (<36.0°C)	275	36.09±0.40	35.71±0.18	0.38±0.40	0.33–0.43	15.839	0.000
Normal (36.0°C–37.9°C)	3285	36.63±0.42	36.62±0.42	0.01±0.33	−0.01–0.02	0.979	0.327
Fever (≥38.0°C)	61	38.11±0.54	38.27±0.36	−0.17±0.35	−0.26–−0.08	−3.682	0.000
Sex
Man	1480	36.57±0.45	36.60±0.49	−0.03±0.35	−0.05–−0.02	−3.610	0.000
Woman	2141	36.64±0.51	36.57±0.54	0.08±0.35	0.06–0.09	10.003	0.000
BMI (kg/m2)
Low (<18.5)	187	36.74±0.42	36.60±0.47	0.14±0.34	0.09–0.19	5.368	0.000
Normal (18.5–23.9)	2156	36.66±0.50	36.63±0.53	0.04±0.34	0.02–0.05	4.869	0.000
Overweight (24.0–27.9)	1018	36.51±0.46	36.50±0.50	0.01±0.36	−0.02–0.03	0.653	0.514
Obese (≥28.0)	260	36.51±0.45	36.50±0.46	0.01±0.43	−0.04–0.07	0.529	0.598
Total	3621	36.61±0.49	36.58±0.52	0.03±0.35	0.02–0.04	5.326	0.000

*Number of paired temperature data sets.

†Estimated by Student’s t-test for matched pairs.