Table:
Subgroup	Number of studies	Pooled RR(95% CI)	Q-test for heterogeneity
P value	I2 score
Study design
Cohort studies	5	0.84 (0.42, 1.26)	0.023	64.8%
Case-control studies	9	0.87 (0.54, 1.21)	< 0.001	89.7%
Hospital-based case-control studies	6	0.88 (0.40, 1.36)	< 0.001	92.5%
Population-based case-control studies	3	0.83 (0.63, 1.03)	0.586	0
Geographical region
Europe	7	0.95 (0.49, 1.42)	< 0.001	91.9%
US/Canada	3	0.80 (0.58, 1.02)	0.891	0
Japan	3	0.76 (0.25, 1.27)	0.019	74.7%
Exposure assessment
Interview	6	0.88 (0.40, 1.36)	< 0.001	92.5%
Mailed questionnaire	7	0.84 (0.58, 1.09)	0.025	58.5%
Case sample size
Large	7	0.99 (0.82, 1.17)	0.215	28.0%
Small	7	0.68 (0.34, 1.02)	< 0.001	81.4%

What are the following photo content in markdown style: | Subgroup | Number of studies | Pooled RR(95% CI) | <COLSPAN=2> Q-test for heterogeneity | 
 |  |  |  | P value | I2 score | 
 | --- | --- | --- |

--- | --- | 
 | <COLSPAN=5> Study design | 
 | Cohort studies | 5 | 0.84 (0.42, 1.26) | 0.023 | 64.8% | 
 | Case-control studies | 9 | 0.87 (0.54, 1.21) | < 0.001 | 89.7% | 
 | Hospital-based case-control studies | 6 | 0.88 (0.40, 1.36) | < 0.001 | 92.5% | 
 | Population-based case-control studies | 3 | 0.83 (0.63, 1.03) | 0.586 | 0 | 
 | <COLSPAN=5> Geographical region | 
 | Europe | 7 | 0.95 (0.49, 1.42) | < 0.001 | 91.9% | 
 | US/Canada | 3 | 0.80 (0.58, 1.02) | 0.891 | 0 | 
 | Japan | 3 | 0.76 (0.25, 1.27) | 0.019 | 74.7% | 
 | <COLSPAN=5> Exposure assessment | 
 | Interview | 6 | 0.88 (0.40, 1.36) | < 0.001 | 92.5% | 
 | Mailed questionnaire | 7 | 0.84 (0.58, 1.09) | 0.025 | 58.5% | 
 | <COLSPAN=5> Case sample size | 
 | Large | 7 | 0.99 (0.82, 1.17) | 0.215 | 28.0% | 
 | Small | 7 | 0.68 (0.34, 1.02) | < 0.001 | 81.4% |