. 2018 Sep 12;22(5):681–688. doi: 10.1093/ntr/nty190

Table 1.

Summary of Puff Volume and Puff Duration Measurements Taken for CReSS and SPA-M

Cigarette type	Mobile device	Puff shape	Puff duration (s)	Puff volume measurement reliability			Puff duration measurement reliability
				Valid puff volume range (mL)		Puff volume accuracy (%)*	Valid puff volume range (mL)		Puff duration accuracy (%)^a
				Minimum	Maximum	Puff volume accuracy (%)*	Minimum	Maximum	Puff duration accuracy (%)^a
Blu electronic cigarette	CReSS	Bell	2	20	130	±15	30	100	−8 to −22
		Bell	5	40	130	±15	60	130	−6 to −21
		Square	2	20	130	±10	20	100	0 to −18
		Square	5	30	130	−16 to +11	30	130	0 to −15
	SPA-M	Bell	2	10	130	±10	10	130	±10
		Bell	5	20	130	±10	20	130	±10
		Square	2	10	130	±10	10	130	±10
		Square	5	20	130	±10	10	130	±10
3R4F cigarette	CReSS	Bell	2	20	130	−10 to +20	20	90	−10 to −20
		Bell	5	40	130	0 to +20	50	130	−5 to −20
		Square	2	20	130	0 to +21	20	100	0 to −20
		Square	5	30	130	−10 to +23	30	130	0 to −20
	SPA-M	Bell	2	10	130	±10	10	130	±10
		Bell	5	20	130	±10	20	130	±10
		Square	2	10	130	±10	10	130	±10
		Square	5	20	130	±10	10	130	±10
Joyetech eVic	CReSS	Square	2	20	130	0 to +23	20	130	0 to −11
	CReSS	Square	5	20	130	−3 to +23	20	130	±10
	SPA-M	Square	2	20	130	0 to +15	10	130	±10
	SPA-M	Square	5	20	130	0 to +22	10	130	±10
Smokio	CReSS	Square	2	20	130	0 to +24	20	130	0 to −12
	CReSS	Square	5	30	130	0 to +22	30	130	±10
	SPA-M	Square	2	10	130	−10 to 0	10	130	±10
	SPA-M	Square	5	20	130	±10	10	130	±10

^aAccuracy = deviation from target. For measures demonstrating consistent variability the error rate is given; for inconsistent measures, the outer ranges of measured values are reported. CReSS = Clinical Research Support System; SPA-M = Smoking Puff Analyzer Mobile.