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. 2021 Apr 27;41(7):1221–1231. doi: 10.1007/s00296-021-04838-y

Table 3.

Factors associated with prevalence estimates

Factors OR (95% CI) % Variance explained
Publication year (per 10 years) 1.10 (1.00–1.20) 9.10
Sample size (per 1000) 0.97 (0.94–0.99) 13.62
Study quality score 0.96 (0.93–1.00) 9.95
Percent female 1.01 (1.00–1.01) 7.03

OR Odds ratio