Dose-response relationship of lung cancer to amount smoked, duration and age starting

Table 15 Age of starting to smoke by current smokers - fitted values of β₁ and SE, and P values for goodness-of-fit tests for the linear model and for the best-fitting power model

Block: Study	Linear model1log RR = β1(70 - a)/10			Power model1log RR = β1(70 - a)/101.44
	β1	SE β1	P (fit)2	β1	SE β1	P (fit)2
1: CEDERL	0.0385	0.0082	NS	0.1828	0.0394	NS
2: CEDERL	0.0140	0.0089	NS	0.0699	0.0445	NS
3: CPSI	0.0461	0.0041	0.0490	0.2167	0.0188	NS
4: CPSI	0.0524	0.0029	(0.0959)	0.2399	0.0135	(0.0579)
5: CPSI	0.0512	0.0047	0.0195	0.2408	0.0223	0.0307
6: CPSI	0.0301	0.0036	(0.0510)	0.1480	0.0175	NS
7: CPSI	0.0237	0.0046	NS	0.1168	0.0238	0.0828
8: DEAN3	0.0332	0.0041	NS	0.1482	0.0189	0.0342
9: DEAN3	0.0209	0.0039	NS	0.0960	0.0187	NS
10: DORN	0.0549	0.0037	(0.0874)	0.2527	0.0166	NS
11: DORN	0.0455	0.0027	NS	0.2086	0.0125	NS
12: ENGELA	0.0360	0.0037	0.0109	0.1682	0.0171	0.0269
13: ENGELA	0.0442	0.0045	NS	0.2186	0.0221	NS
14: GAO2	0.0394	0.0066	NS	0.1909	0.0318	NS
15: HIRAYA	0.0317	0.0022	NS	0.1497	0.0104	0.0288
16: HIRAYA	0.0207	0.0029	NS	0.1086	0.0152	NS
17: LIAW	0.0296	0.0050	0.0396	0.1448	0.0242	(0.0661)
18: MATOS	0.0411	0.0063	NS	0.1933	0.0296	NS
19: MIGRAN	0.0373	0.0087	NS	0.1612	0.0385	NS
20: MIGRAN	0.0400	0.0108	NS	0.1859	0.0519	NS
21: MRFITR	0.0686	0.0237	NS	0.2931	0.1055	NS
22: SEGI2	0.0468	0.0140	NS	0.2325	0.0639	NS
23: SEGI2	0.0440	0.0128	NS	0.1974	0.0557	NS
24: SEGI2	0.0192	0.0109	NS	0.0945	0.0500	NS
25: SVENSS	0.0432	0.0051	NS	0.2064	0.0246	NS
26: WAKAI	0.0275	0.0068	NS	0.1244	0.0318	NS
27: WU	0.0348	0.0063	NS	0.1741	0.0305	NS

¹a = Age of starting to smoke;

²Not significant (NS) indicates P≥ 0.1. P values in the range 0.05 ≤P < 0.1 are shown in brackets.