Table 1. Serum 25OHD concentrations in participants of South Asian and European descent by sex and age, both seasons combined¹.

Sex	Age	South Asian ancestry		European ancestry
		N	nmol/L	N	nmol/L
Both	20–39	174	42.7 (40.5, 45.0)a	233	70.8 (68.1, 73.5)*a
Both	40–59	287	49.5 (47.1, 51.8)b	272	71.3 (68.7, 74.0)*a
Both	60–79	125	57.2 (53.6, 60.9)c	147	76.9 (72.7, 81.1)*a
Both	20–79	586	49.1 (47.5, 50.7)	652	72.4 (70.7, 74.1)*
Females	20–39	91	45.4 (41.9, 48.8)a	167	72.0 (68.7, 75.3)*a
Females	40–59	138	54.0 (50.4, 57.6)a	188	73.0 (69.8, 76.1)*a
Females	60–79	44	65.1 (59.3, 70.9)b	88	81.6 (75.5, 87.6)*b
Females	20–79	273	52.9 (50.5, 55.3)	443	74.3 (72.1, 76.5)*
Males	20–39	83	39.8 (37.0, 42.6) a	66	67.8 (63.1, 72.5)*a
Males	40–59	149	45.3 (42.3, 48.2)†b	84	67.7 (62.9, 72.4)†*a
Males	60–79	81	53.0 (48.5, 57.5)c	59	69.9 (64.8, 75.1)†*a
Males	20–79	313	45.8 (43.8, 47.8)†	209	68.4 (65.6, 71.1)†

¹Values represent mean (CI) for the indicated number of observations (N).

ANOVA showed an effect of ethnic background, Age and Sex as well as an age*ethnic background interaction.

Superscripts show significantly difference from South Asians (*) age and females (†) as determined by ANOVA.

Ages with different letters are significantly different at the P<0.05 level as determined by Tukey’s studentized range test.