Clinical assessment of nail and skin lesions in indoor climbers: A clinic-based cross-sectional study

Table 7 Summary of key associations between exposure variables and total lesion burden

Variable	Analysis	Effect size	95%CI	P value
Shoe size delta	Spearman ρ	0.195	0.04-0.34	0.015
Shoe size delta	IRR (multivariable)	1.08	1.01-1.16	0.028
Weekly training frequency	Spearman ρ	0.180	0.02-0.32	0.025
Weekly training frequency	IRR (multivariable)	1.11	1.02-1.20	0.014
Total weekly volume	Spearman ρ	0.172	0.01-0.31	0.032
Total weekly volume	IRR (multivariable)	1.05	0.99-1.11	0.081
Session duration	Spearman ρ	0.09	-	0.24
Age	Spearman ρ	-0.03	-	0.68
Sex	Mann-Whitney U	r = 0.06	-	0.41
BMI	Spearman ρ	Approximately 0	-	> 0.05

All ρ values < 0.20 and significant incidence rate ratios close to 1.0 confirm weak effect sizes throughout. IRR: Incidence rate ratio from multivariable negative binomial regression; BMI: Body mass index; CI: Confidence interval.