Table 4. Effect of respiratory rate measurements on clinical prediction/diagnostic rules*.

SIRS	Video	1	2	3	4	5
	True respiratory rate	28/min	13/min	22/min	19/min	25/min
	Score based on true respiratory rate	1	0	1	0	1
	0 points based on measurement	N = 29, 6.5%	N = 421, 94.0%	N = 47, 10.5%	N = 380, 84.8%	N = 25, 5.6%
	1 point based on measurement	N = 419, 93.5%	N = 27, 6.0%	N = 401, 89.5%	N = 68, 15.2%	N = 423, 94.4%
	Incorrect lower score: N = 101 (4.5%) Incorrect higher score: N = 95 (4.2%)
qSOFA	Video	1	2	3	4	5
	True respiratory rate	28/min	13/min	22/min	19/min	25/min
	Score based on true respiratory rate	1	0	1	0	1
	0 points based on measurement	N = 30, 6.7%	N = 422, 94.2%	N = 56, 12.5%	N = 386, 86.2%	N = 26, 5.8%
	1 point based on measurement	N = 418, 93.3%	N = 26, 5.8%	N = 392, 87.5%	N = 62, 13.8%	N = 422, 94.2%
	Incorrect lower score: N = 112 (5.0%) Incorrect higher score: N = 88 (3.9%)
NEWS	Video	1	2	3	4	5
	True respiratory rate	28/min	13/min	22/min	19/min	25/min
	Score based on true respiratory rate	3	0	2	0	3
	0 points based on measurement	N = 19, 6.5%	N = 376, 84.0%	N = 45, 10.0%	N = 377, 84.2%	N = 24, 5.4%
	1 point based on measurement	N = 0, 0%	N = 35, 7.8%	N = 2, 0.4%	N = 3, 0.7%	N = 1, 0.2%
	2 points based on measurement	N = 25, 5.6%	N = 10, 2.2%	N = 295, 65.8%	N = 54, 12.1%	N = 42, 9.4%
	3 points based on measurement	N = 404, 90.2%	N = 27, 6.0%	N = 106, 23.7%	N = 14, 3.1%	N = 381, 85.0%
	Incorrect lower score: N = 158 (7.1%) Incorrect higher score: N = 249 (11.1%)
MEWS	Video	1	2	3	4	5
	True respiratory rate	28/min	13/min	22/min	19/min	25/min
	Score based on true respiratory rate	2	0	2	1	2
	0 points based on measurement	N = 2, 0.4%	N = 248, 55.4%	N = 8, 1.8%	N = 10, 2.2%	N = 4, 0.9%
	1 point based on measurement	N = 27, 6.0%	N = 163, 36.4%	N = 39, 8.7%	N = 370, 82.6%	N = 21, 4.7%
	2 points based on measurement	N = 98, 21.9%	N = 29, 6.5%	N = 371, 82.9%	N = 63, 14.1%	N = 321, 71.7%
	3 points based on measurement	N = 321, 71.7%	N = 8, 1.8%	N = 30, 6.7%	N = 5, 1.1%	N = 102, 22.8%
	Incorrect lower score: N = 111 (5.0%) Incorrect higher score: N = 721 (32.2%)

* Incorrect lower or higher score means that the number of points that would be scored on the clinical rule was different when comparing a measurement with the true respiratory rate. In other words: the score of the clinical rule would be influenced by the respiratory rate measurement. Correct, or unaffected, scores are presented in green, incorrect scores are presented in red.