Table 2: Year published and quality assessment of selected studies

From: Alcohol consumption and erectile dysfunction: meta-analysis of population-based studies

   Internal validityExternal validityStatistical adjustments for odds ratio
 Reference no.YearabcdefghiSumjklMnopqrSumstuvwxyzAaSum
Shaeer132003+++++++7++++++6+1
Moreira142002+++++++7+++++++7+1
Akkus152002+++++++7+++++5++++++++8
Bai162004+++++++7++++4+1
Nicolosi52003+++++++7++++4+++++++7
Millett172006++++4+++++5+++++5
Parazzini182000+++++5++++++6+++3
Mak192002++++++++8+++++5+1
Fedele202000++++++6+++++5++2
Cho212003++++++++8++++++6++++4
Terai222004++++++++8+++++5+1