Table 1.

Pearson׳s correlation between Google Trends-based data and epidemiological data in the study period 2004–2010.

Variable		GT-based silicosis (Disease)	GT-based silicosis (search term)
Gender
Female	Correlation coefficient	−0.145	−0.144
	Significance level P	0.7562	0.7588
Male	Correlation coefficient	0.778⁎	0.765⁎
	Significance level P	0.0394	0.0453
Ethnicities
White	Correlation coefficient	0.713	0.696
	Significance level P	0.0720	0.0825
Female	Correlation coefficient	0.010	−0.001
	Significance level P	0.9832	0.9980
Male	Correlation coefficient	0.767⁎	0.755⁎
	Significance level P	0.0441	0.0498
Black	Correlation coefficient	0.841⁎	0.847⁎
	Significance level P	0.0177	0.0162
Female	Correlation coefficient	−0.176	−0.162
	Significance level P	0.7066	0.7281
Male	Correlation coefficient	0.855⁎	0.859⁎
	Significance level P	0.0143	0.0132
Other	Correlation coefficient	−0.135	−0.162
	Significance level P	0.7731	0.7286
Female	Correlation coefficient	−0.292	−0.254
	Significance level P	0.5249	0.5833
Male	Correlation coefficient	−0.019	−0.055
	Significance level P	0.9676	0.9074
Adjusted white
Female	Correlation coefficient	−0.015	−0.007
	Significance level P	0.9751	0.9876
Male	Correlation coefficient	0.787⁎	0.778⁎
	Significance level P	0.0357	0.0396
Adjusted black
Female	Correlation coefficient	−0.155	−0.149
	Significance Level P	0.7396	0.7507
Male	Correlation coefficient	0.864⁎	0.867⁎
	Significance level P	0.0122	0.0116
Adjusted other
Female	Correlation coefficient	−0.292	−0.254
	Significance level P	0.5249	0.5833
Male	Correlation coefficient	0.030	0.004
	Significance level P	0.9490	0.9939
Adjusted overall	Correlation coefficient	0.823⁎	0.816⁎
	Significance level P	0.0231	0.0253
Age
age 15–24	Correlation coefficient	−0.070	−0.018
	Significance level P	0.8813	0.9695
age 25–34	Correlation coefficient	−0.657	−0.656
	Significance level P	0.1091	0.1092
age 35–44	Correlation coefficient	0.501	0.533
	Significance level P	0.2520	0.2179
age 45–54	Correlation coefficient	0.308	0.278
	Significance Level P	0.5017	0.5466
age 55–64	Correlation coefficient	0.457	0.468
	Significance level P	0.3031	0.2898
age 65–74	Correlation coefficient	0.619	0.622
	Significance level P	0.1379	0.1357
age 75–84	Correlation coefficient	0.701	0.677
	Significance level P	0.0792	0.0949
age 85-on	Correlation coefficient	0.462	0.442
	Significance level P	0.2966	0.3208
No. >45	Correlation coefficient	0.747	0.730
	Significance level P	0.0535	0.0623
No. 15–44	Correlation coefficient	0.291	0.334
	Significance level P	0.5262	0.4636
Underlying	Correlation coefficient	−0.850⁎	−0.832⁎
	Significance level P	0.0154	0.0203
Number of deaths	Correlation coefficient	0.759⁎	0.746
	Significance level P	0.0477	0.0542
Death rate	Correlation coefficient	0.805⁎	0.794⁎
	Significance level P	0.0291	0.0329

^⁎Statistically significant, with p-value <0.05.