Table 4 Multiple Liner Regressions of Leukocyte Counts With Each Exercise Performance Stratified by Age.

	N	WBC Counts 25^th–50^th %			WBC Counts 50^th–75^th %			WBC Counts 75^th–100^th %
	N	β-value	95% CI	p-value	β-value	95% CI	p-value	β-value	95% CI	p-value
2-min push-ups (numbers)
30–50 y/o	1787	−0.43	−1.66–0.80	0.49	−0.94	−1.58–−0.30	<0.01	−0.51	−0.94–−0.07	0.02
18–29 y/o	1640	0.59	−1.07–2.24	0.48	−0.06	−0.97–0.86	0.90	−0.58	−1.25–0.09	0.09
2-min sit-ups (numbers)
30–50 y/o	1794	0.08	−0.96–1.10	0.88	−0.50	−1.02–0.02	0.06	−0.24	−0.59–0.11	0.18
18–29 y/o	1643	0.50	−0.67–1.68	0.40	0.16	−0.45–0.76	0.61	−0.19	−0.59–2.14	0.35
3000-m run (seconds)
30–50 y/o	1598	4.42	−3.75–12.58	0.28	5.40	1.29–9.51	0.01	4.93	1.75–8.09	<0.01
18–29 y/o	1510	−0.36	−9.97–9.26	0.94	4.10	−1.19–9.40	0.12	4.14	0.32–7.95	<0.001

Data are presented as β-value and 95% confidence intervals (CI) using Pearson’s correlation coefficient for Model 4: age, service specialty, body mass index, waist circumference, alcohol intake status, cigarette smoking status and weekly physical activity.

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