An evaluation of the Swiss staging model for hypothermia using case reports from the literature

Table 3 Correspondence between clinical stage and the measured temperature for the 183 cases. The increase in the percentage of cases classified correctly at higher stages was globally non-significant in a chi-square test (p = 0.48) due to the small number of patients in the Stage 1 and Stage 2 groups. T° = core body temperature in °C

	≥32 T° <35	≥28 T° <32	≥24 T <28	T° < 24	overall, N (%)	mean T ± SD^a	95 % CI for mean	95 % prediction interval^b
Stage 1, n (%)	4	6	0	0	10 (5.5)	31.3 ± 2.2	29.7-32.9	26.9-35.7
Stage 2, n (%)	3	11	8	2	24 (13.1)	28.3 ± 3.2	27.0-29.6	22.0-34.6
Stage 3, n (%)	3	12	33	20	68 (37.2)	25.6 ± 3.2	24.9-26.4	19.3-32.0
Stage 4, n (%)	0	9	25	47	81 (44.3)	22.7 ± 4.3	21.7-23.6	14.0-31.4

^aIn nine cases, we retained the lowest temperature of the thermometer as the actual temperature
^b95 % prediction intervals were calculated assuming normality as mean ± 2SD

ISSN: 1757-7241