Table 1

Number of children sampled in SPARCLE2, by SPARCLE1 status, region and participation status in SPARCLE2
Population-based registers
North England* Northern Ireland* West Sweden* East Denmark* South west Ireland** Central Italy** South east France South west France** North west Germany ALL REGIONS
n (%) n (%) n (%) n (%) n (%) n (%) n (%) n (%) n (%) n (%)
Longitudinal sample
  SPARCLE1 participants 116 (100) 102 (100) 83 (100) 115 (100) 98 (100) 85 (100) 67 (100) 77 (100) 75 (100) 818 (100)
   Participated in SPARCLE2 80 (69) 85 (83) 68 (82) 77 (67) 74 (76) 41 (48) 50 (75) 55 (71) 64 (85) 594 (73)
   Did not participate in SPARCLE2 36 (31) 17 (17) 15 (18) 38 (33) 24 (24) 44 (52) 17 (25) 22 (29) 11 (15) 224 (27)
Supplementary sample
  (i) Children sampled in SPARCLE1, who
   did not participate in SPARCLE1 10 (100) 53 (100) 18 (100) 81 (100)
   Participated in SPARCLE2 1 (10) 7 (13) 1 (6) 9 (11)
   Did not participate in SPARCLE2 9 (90) 46 (87) 17 (94) 72 (89)
  (ii) Children not sampled in SPARCLE1 60 (100) 22 (100) 33 (100) 5 (100) 1 (100) 38 (100) 22 (100) 10 (100) 191 (100)
   Late registrations 31 22 0 3 1 12 22 91
   Incomers 2 0 0 2 0 0 0 4
   On register for SPARCLE1    but not sampled 27 0 33 0 0 25 0 85
   Missed in SPARCLE1 0 0 0 0 0 1 0 1
Participated in SPARCLE2 29 (48) 3 (14) 9 (27) 2 (40) 1 (100) 8 (21) 2 (9) 10 (100) 64 (34)
Did not participate in SPARCLE2 31 (52) 19 (86) 24 (73) 3 (60) 0 (0) 30 (79) 20 (91) 0 (0) 124 (66)
All SPARCLE2 participants 109 88 68 86 77 42 65 58 74 667

* In these regions, a random sample of eligible children was targeted in SPARCLE1. ** in these regions, all eligible children were targeted. † Southeast France did not include in SPARCLE1 all registered children in the eligible range of dates of birth; this was partially rectified. in SPARCLE2.

Dickinson et al.

Dickinson et al. BMC Research Notes 2012 5:300   doi:10.1186/1756-0500-5-300

Open Data