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Table 1 Distribution of participants according to total, filtered, instant, and boiled coffee consumption, the Norwegian Women and Cancer Study, 1991–2013 - complete case analyses

From: Coffee consumption and the risk of malignant melanoma in the Norwegian Women and Cancer (NOWAC) Study

  Total coffee consumption
Light consumers Low moderate consumers High moderate consumers Heavy consumers
≤1 cup/day >1–3 cups/day >3–5 cups/day >5 cups/day
Baseline, N (%) 16,853 (16.2) 29,923 (28.7) 34,451 (33.1) 22,853 (22.0)
Follow-up, N (%) 13,712 (19.4) 25,113 (35.5) 21,154 (29.9) 10,717 (15.2)
  Filtered coffee consumption
  ≤1 cup/day >1–3 cups/day >3–5 cups/day >5 cups/day
Baseline, N (%) 41,942 (40.3) 26,708 (25.7) 23,014 (22.1) 12,416 (11.9)
Follow-up, N (%) 24,450 (38.3) 19,868 (31.2) 13,257 (20.8) 6179 (9.7)
  Instant coffee consumption
  ≤1 cup/day >1–3 cups/day >3–5 cups/day >5 cups/day
Baseline, N (%) 95,584 (91.8) 5563 (5.3) 2070 (2.0) 863 (0.8)
Follow-up, N (%) 58,108 (91.1) 3941 (6.2) 1212 (1.9) 493 (0.8)
  Boiled coffee consumption
  ≤1 cup/day >1–3 cups/day >3–5 cups/day >5 cups/day
Baseline, N (%) 83,094 (79.8) 8283 (8.0) 7474 (7.8) 5229 (5.0)
Follow-up, N (%) 56,441 (88.5) 3671 (5.8) 2258 (3.5) 1384 (2.2)