Table 2.

Estimates of intercept (FEV1 % predicted at age 6), slope (% predicted per year), and E( $T_i^0$) (log(years survived from age 6)) from the lognormal joint model with correction for left truncation (JM-C) and the lognormal joint model without correction for left truncation (JM-UN), stratified by birth cohort.

Birth cohort	Intercept estimate (± SE)		Slope estimate (± SE)		E( $T_i^0$) estimate (± SE) (median age at death (yrs))◆
	JM-C	JM-UN	JM-C	JM-UN	JM-C	JM-UN
1930–49	80.63 ± 5.48	87.97 ± 4.26	−3.39 ± 0.46	−2.72 ± 0.22	2.80 ± 0.22 (22.44)	3.21 ± 0.08 (30.78)
1950–59	78.27 ± 1.68	80.04 ± 1.60	−3.04 ± 0.14	−2.76 ± 0.12	2.89 ± 0.06 (23.99)	3.04 ± 0.05 (26.91)
1960–69	81.68 ± 1.55	83.26 ± 1.47	−3.16 ± 0.13	−2.88 ± 0.12	2.80 ± 0.04 (22.44)	2.94 ± 0.04 (24.92)
1970–79	86.18 ± 1.89	88.52 ± 1.81	−2.93 ± 0.17	−2.66 ± 0.14	2.97 ± 0.07 (25.49)	3.13 ± 0.06 (28.87)
1980–89	100.66 ± 2.07	100.97 ± 2.06	−2.36 ± 0.15	−2.32 ± 0.15	3.44 ± 0.12 (37.19)	3.47 ± 0.12 (38.14)
1990–2006	101.19 ± 2.24	101.21 ± 2.23	−1.98 ± 0.23	−1.97 ± 0.23	–	–

^◆median age at death= exp(E( $T_i^0$))+6