Table 2

Illustrative effects of price increases on probability of a smoking cessation attempt across left-digit transitions

Unit prices	Pack prices	QA means (%)	Absolute increase	Cohen's d	% QA increase	%P increase	%ΔQA/%ΔP	Medians (%)	% P₅₀	% BP
18¢–19¢	$3.60–$3.80	16.52–17.03	0.51	0.11	3.05	5.56	0.55	0–0	17.50–17.97	4.19–4.38
19¢–20¢	$3.80–$4.00	17.03–19.35	2.32	0.26	13.67	5.26	2.60	0–0	17.97–21.32	4.38–4.84
23¢–24¢	$4.60–$4.80	23.58–24.36	0.78	0.19	3.30	4.35	0.76	10–10	26.33–27.00	5.49–5.77
24¢–25¢	$4.80–$5.00	24.36–29.58	5.22	0.34	21.44	4.17	5.15	10–20	27.00–34.17	5.77–8.47
28¢–29¢	$5.60–$5.80	36.96–38.39	1.43	0.22	3.86	3.57	1.08	30–30	42.09–43.58	12.85–13.51
29¢–30¢	$5.80–$6.00	38.39–45.03	6.64	0.44	17.29	3.45	5.01	30–50	43.58–51.02	13.51–18.62
33¢–34¢	$6.60–$6.80	50.62–52.10	1.48	0.22	2.91	3.03	0.96	50–50	57.73–58.85	21.97–23.21
34¢–35¢	$6.80–$7.00	52.10–57.79	5.69	0.43	10.94	2.94	3.72	50–51	58.85–64.90	23.21–29.24
38¢–39¢	$7.60–$7.80	62.03–62.74	0.71	0.20	1.15	2.63	0.44	70–70	69.55–70.11	33.71–34.36
39¢–40¢	$7.80–$8.00	62.74–67.24	4.50	0.41	7.17	2.56	2.80	70–75	70.11–74.49	34.36–40.32
43¢–44¢	$8.60–$8.80	69.77–70.25	0.48	0.21	0.68	2.33	0.29	80–85	76.44–76.63	42.74–43.11
44¢–45¢	$8.80–$9.00	70.25–72.99	2.74	0.36	3.90	2.27	1.72	85–90	76.63–79.70	43.11–47.39
48¢–49¢	$9.60–$9.80	75.06–75.44	0.38	0.19	0.50	2.08	0.24	99–100	81.84–82.31	49.81–50.09
49¢–50¢	$9.80–$10.00	75.44–79.08	3.64	0.36	4.83	2.04	2.37	100–100	82.31–85.85	50.09–55.96

In each case, the left-digit price transition and the prior price transition are reported.
P, price; QA, estimated probability of making a quit attempt; % BP, percent of sample at breakpoint (ie, reporting 100% probability of making a quit attempt); % P₅₀, percent of sample at ≥50% probability of making a quit attempt; %ΔQA/%ΔP reflects proportionate price sensitivity; ¢, US cent; $, US dollar.