Disability score (ODI or NDI) along follow-up period (0-, 2-, 4-, and 8-week)

Drug Time (wk) Delta-method z P value 95% confidence interval
Margin Standard error
Dexamethasone 0 34.65 1.01 34.46 < 0.001 32.68 36.63
2 31.02 1.01 30.84 < 0.001 29.04 32.99
4 29.20 1.01 29.04 < 0.001 27.23 31.17
8 28.97 1.01 28.81 < 0.001 27.00 30.94
Betamethasone 0 32.21 0.97 33.14 < 0.001 30.30 34.11
2 28.57 0.97 29.39 < 0.001 26.66 30.47
4 26.76 0.97 27.53 < 0.001 24.85 28.66
8 26.52 0.97 27.29 < 0.001 24.62 28.43

ODI: Oswestry disability index, NDI: neck disability index.

Korean J Pain 2022;35:336~344 https://doi.org/10.3344/kjp.2022.35.3.336
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