Table 1: An overview of the eligible studies

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

ReferenceAuthor, yearCountryDefinition of EDSample sizeAge rangeAlcohol consumptionORalcohol (95% CI)Variables adjusted for ORalcohol
13Shaeer et al., 2003Pakistan
Egypt
Nigeria
Single question derived from NIH consensus: ‘able to get and keep an erection good enough for satisfactory intercourse.’181435–70Yes/no0.53 (0.39–0.74)1
14Moreira et al., 2002BrazilSingle question derived from NIH consensus: ‘able to get and keep an erection adequate for satisfactory intercourse.’60240–70Yes/no0.54 (0.37–0.87)1
15Akkus et al., 2002TurkeySingle question: ‘able to get and keep an erection adequate for sexual intercourse.’198240–70+Yes/no0.55 (0.36–0.85)10
16Bai et al., 2004ChinaIIEF-5220330–70Yes/no0.69 (0.56–0.84)1
5Nicolosi et al., 2003Brazil
Italy
Japan
Malaysia
Single question: ‘able to get and keep an erection adequate for satisfactory sexual intercourse.’241740–70None 1–7/week 8/week1 0.74 (0.53–1.02) 0.73 (0.53–0.99)9
         
17Millett et al., 2006AustraliaSingle question: ‘During the past year has there been a period of one month or more when you trouble keeping an erection when you wanted to?’836716–59Non-drinker16
      1–4/day0.36 (0.28–0.45) 
      4+/day0.89 (0.81–1.34) 
18Parazzini et al., 2000ItalySingle question: ‘ability to achieve and maintain an erection sufficient for satisfactory sexual performance.’201010–>70None13
      1–71.0 (0.6–1.5) 
      8–140.9 (0.6–1.3) 
      15–210.8 (0.5–1.3) 
      220.7 (0.5–1.1) 
19Mak et al., 2002BelgiumIIEF-1579940–70<20 g/day11
      20–40 g/day0.56 (0.37–0.84) 
      40 g/day1.29 (0.88–1.88) 
20Fedele et al., 2000ItalySingle question: ‘ability to achieve and maintain an erection for satisfactory sexual performance.’975645–66None 1–71 0.9 (0.8–1.1)2
      8–140.9 (0.8–1.0) 
      15–211.0 (0.7–1.2) 
      220.9 (0.8–1.0) 
21Cho et al., 2003KoreaIIEF-5350120–60Non or light(<3/week)15
      Moderate (3–4/week)0.91 (0.70–1.18) 
      Heavy (>4/week)1.36 (0.95–1.96) 
22Terai et al., 2004JapanIIEF-5208439–60Yes/no1.70 (0.96–2.99)1
  1. Abbreviations: CI, confidence interval; ED, erectile dysfunction; IIEF, International Index of Erectile Function; OR, odds ratio.