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Table 3 25(OH)D status in population studies of adults (15+) in the order of latitude.

From: Seasonal variance of 25-(OH) vitamin D in the general population of Estonia, a Northern European country

Location Latitude Method N Population representation (subjects per capita) Vitamin D (nmol/L), mean and/or range Deficiency
% <25 nmol/L
Insufficiency
% <50 nmol/L
      summer winter summer winter summer winter
New Zealand [30] 35–47S RIA Diasorin 2946 1:1,400 67 44 0–10 48
Japan [31] 35 N RIA Disaorin 197 1:647,000 79 38 ND ND 1 87
US [32] 25–47 N RIA Disaorin 18462* 1:16,200 62–90 60–79 1–3 1–5 8–34 13–40
Italy [14] 40 N RIA Disaorin 90 1:645,000 84 43 2 ** 18 ** 4 70
Switzerland [33] 46–47 N CPB Amersham 3276 1:2,300 ND 50 † ND 6 † ND 34–95 †
France [7] 43–51 N RIA Incstar 1569 1:39,000 ND 61 (43–94) ND 14 ** ND 75 ***
Germany [29] 49 N RIA Incstar 415 1:199,000 67–70 40–45 ~5 †† 30–40 ND ND
Belgium [18] 50 N ChL Diasorin 126 1:82,000 ND 48 ND ND ND 34 †††
Estonia 59 N RIA Disaorin 367 1:3,600 59 44 <1 8 29 73
Finland [26] 60 N RIA Incstar 328 1:16,000 ND 46 ND 26–28 ND 56–86 ***
  1. * Two different seasonal sub-populations; ** level of <30 nmol/L used to define deficiency; *** own specific cut-off for insufficiency (based on PTH curve) was used; † data from October to June (no summer months); †† no official data in paper (calculated from a figure); ††† level of <37.5 nmol/L was defined as insufficient; ND – no data.