Table 5.

Correlation between consumption of acidic foods and drinks and severity of ETW

	Typical frequency of consumption				Correlation with total ETW severity (Spearman coefficient)
Age group	15	18	35–44	Comparison (Kruskal-Wallis ANOVA with post-hoc analysis by Dunn with Bonferroni correction)	15	18	35–44
Fruit	daily	daily	daily	p < 0.0001 more often among 35-44-year-olds, less often among the group of 18-year-olds,	r = 0.0192 p = 0.3414	r = 0.0107 p = 0.6496	r = -0.0027 p = 0.9156
Juices	daily	daily	daily	p < 0.0001 frequency decreasing with age	r = 0.0138 p = 0.4953	r = -0.0059 p = 0.8036	r = 0.0692 p = 0.0058
Fruit teas	daily	daily	Several times a month	p < 0.0001 less often among 35-44-year-olds	r = -0.0195 p = 0.3331	r = 0.0572 p = 0.0156	r = 0.0412 p = 0.1009
Isotonic drinks	occasionally	occasionally	occasionally	p = 0.0001 less often among 35-44-year-olds	r = 0.0367 p = 0.0694	r = 0.0335 p = 0.1573	r = 0.0423 p = 0.0927
Sweetened beverages	Several times a month	Several times a month	Several times a month	p < 0.0001 frequency decreasing with age	r = 0.0436 p = 0.0308	r = 0.0806 p = 0.0006	r = 0.0498 p = 0.0476
Energy drinks	occasionally	occasionally	occasionally	p = 0.0006 less often among 35-44-year-olds	r = 0.0356 p = 0.0774	r = 0.0018 p = 0.9394	r = 0.0171 p = 0.4971
Pickles, hot sauces	occasionally	occasionally	Several times a month	p < 0.0001 frequency increasing with age	r = 0.0258 p = 0.2021	r = 0.0114 p = 0.6305	r = -0.0522 p = 0.0376
Total consumption of acidic foods and beverages (on a scale of 7 to 28): median Q1-Q3 min-max	14 13–16 7–28	14 12–16 7–28	14 13–17 7–28	p = 0.1038	r = 0.0332 p = 0.0995	r = 0.0572 p = 0.0153	r = 0.0546 p = 0.0298