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. 2016 Oct 31;11:2711–2720. doi: 10.2147/COPD.S111629

Table 3.

The average amount of IL serum level in the supplementation and control groups

Variables Measurement stage Supplementation group (n=45) Placebo group (n=45) P-valuea
IL (ng/mL) At the beginning 6.38±1.95 6.27±1.02 0.72
At the end 5.61±0.93 6.60±1.07 0.02a
P-valueb 0.008b 0.025b

Notes:

a

Independent-sample t-test significant difference in the sixth week between groups.

b

Paired t-test significant difference at the beginning and the end of the study in each group. Data are presented as mean ± SD.

Abbreviations: IL, interleukin 1β; SD, standard deviation.