Table 1.

GLMs statistics for boys.

Birth cohort	B	SE	95% Wald CI		Hypothesis test
			Lower	Upper	Wald Chi-Square	Sig.
(Intercept)	51.057	0.1466	50.769	51.344	121,269.658	0.000
1983	−0.094	0.2046	−0.495	0.307	0.213	0.645
1984	−0.591	0.2044	−0.991	−0.190	8.352	0.004
1985	−0.925	0.2031	−1.323	−0.527	20.752	0.000
1986	−0.092	0.2063	−0.496	0.313	0.198	0.657
1987	−1.247	0.2048	−1.648	−0.845	37.064	0.000
1988	−0.850	0.2054	−1.253	−0.448	17.145	0.000
1989	−1.717	0.2086	−2.126	−1.308	67.755	0.000
1990	−1.830	0.2114	−2.244	−1.416	74.920	0.000
1991	−2.031	0.2123	−2.447	−1.615	91.479	0.000
1992	−1.391	0.2162	−1.814	−0.967	41.356	0.000
1993	−2.145	0.2169	−2.570	−1.720	97.795	0.000
1994	−2.454	0.2177	−2.881	−2.028	127.115	0.000
1995	−2.084	0.2183	−2.512	−1.657	91.178	0.000
1996	−2.387	0.2181	−2.814	−1.959	119.734	0.000
1997	−2.398	0.2194	−2.828	−1.968	119.427	0.000
1998	−2.893	0.2198	−3.324	−2.463	173.215	0.000
1999	−2.898	0.2205	−3.330	−2.466	172.747	0.000
2000	−3.095	0.2174	−3.522	−2.669	202.646	0.000
2001	−1.969	0.2192	−2.398	−1.539	80.695	0.000
2002	−2.368	0.2193	−2.798	−1.938	116.598	0.000
2003	−1.704	0.2200	−2.135	−1.272	59.936	0.000
2004	−0.747	0.2181	−1.175	−0.320	11.735	0.001
2005	−1.123	0.2166	−1.548	−0.699	26.900	0.000
2006	−0.256	0.2137	−0.675	0.163	1.432	0.231
2007	0.642	0.2113	0.228	1.056	9.226	0.002
2008	0a

^a2008 is a reference cohort.