Erratum to: Osteoporos Int

DOI: 10.1007/s00198-015-3386-5

Dear Editor,

In response to the communication from Drs. Bolland, Avenell, Grey, and Reid [1], we offer the following additional data and analyses. We apologize for several errors in Table 1 of the original publication [2]; the updated table is reproduced here (Table 1). We also offer the following method clarifications:

Table 1 Summary of meta-analysis results for calcium plus vitamin D supplementation versus placebo and fracture risk
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  • If studies reported multiple results, we used the data from participants who completed the studies (ie, per-protocol analysis).

  • Porthouse et al. stated: “In our unadjusted analysis we present the incidence of fracture by equally or unequally allocated groups as in any meta-analysis these need to be entered as two separate studies.” Therefore we treated these data as two studies since there was no overlapping in study participants among groups.

  • RRs were calculated using the original numbers of events and non-events in each group.

After incorporating the above suggestions from Bolland et al., the overall RR (95 % CI) for total fractures changed from 0.85 (0.73–0.98) to 0.86 (0.75–0.98) (Fig. 1), and the overall RR (95 % CI) for hip fractures changed from 0.70 (0.56–0.87) to 0.61 (0.46–0.82) (Fig. 2). These alterations do not affect the original publication’s conclusions. These data could further suggest that calcium with vitamin D supplementation may have a greater impact on preventing hip fractures than originally described.

Fig. 1
figure 1

Total fractures

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Fig. 2
figure 2

Hip fractures

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We also apologize for a typographical error in the original text [2]. The dataset contains 192 hip fractures, as listed in the original publication’s table (not 195). Since the number of 192 hip fractures were used in the data analysis, this error did not affect the outcome of the study.