Table 2 Number of subjects in the cohort throughout the follow-up time. The table also shows crude data on the number of subjects receiving SL or DP of ≥ 90, ≥ 180 and ≥ 270 mean annual days, and mean annual days throughout the complete 10-year follow up time (-T5 to T5) in relation to gender for both SL and DP

Number of subjects in the study population

  -T5 to T1

199 321

17 853

1645

436

  T2

180 575

16 058

1576

425

  T3

161 469

14 238

1503

407

  T4

139 755

12 203

1393

380

  T5

119 629

10 346

1279

338

Subjects with ≥ 90 mean annual days on SL

  -T5

6652 (3%)

1044 (6%)

133 (8%)

30 (7%)

  -T1

7926 (4%)

1438 (8%)

179 (11%)

67 (15%)

  T0

8360 (4%)

1693 (9%)

194 (12%)

66 (15%)

  T1

8515 (4%)

1638 (9%)

194 (12%)

81 (19%)

  T5

4930 (4%)

743 (7%)

126 (10%)

34 (10%)

Subjects with ≥ 180 mean annual days on SL

  -T5

3727 (2%)

590 (3%)

81 (5%)

24 (6%)

  -T1

4388 (2%)

877 (5%)

110 (7%)

42 (10%)

  T0

4730 (2%)

1081 (6%)

124 (8%)

50 (11%)

  T1

4819 (2%)

997 (6%)

122 (7%)

55 (13%)

  T5

2732 (2%)

451 (4%)

86 (7%)

15 (4%)

Subjects with ≥ 270 mean annual days on SL

  -T5

2064 (1%)

326 (2%)

44 (3%)

9 (2%)

  -T1

2450 (1%)

527 (3%)

65 (4%)

26 (6%)

  T0

2671 (1%)

633 (4%)

63 (4%)

29 (7%)

  T1

2736 (1%)

612 (3%)

75 (5%)

35 (8%)

  T5

1532 (1%)

282 (3%)

60 (5%)

9 (3%)

Mean annual net days SL (-T5 to T5)

  Men

6.6 days

14.0 days

20.4 days

26.2 days

  Women

12.7 days

23.8 days

30.7 days

38.5 days

Subjects with ≥ 90 mean annual days on DP

  -T5

10 030 (5%)

1666 (9%)

161 (10%)

69 (17%)

  -T1

12 694 (6%)

2161 (12%)

242 (15%)

93 (21%)

  T0

13 314 (7%)

2288 (13%)

262 (16%)

99 (23%)

  T1

13 890 (7%)

2439 (14%)

287 (17%)

113 (26%)

  T5

11 212 (9%)

1993 (19%)

279 (22%)

110 (33%)

Subjects with ≥ 180 mean annual days on DP

  -T5

9010 (5%)

1506 (8%)

141 (9%)

60 (15%)

  -T1

11 424 (6%)

1951 (11%)

203 (12%)

84 (19%)

  T0

11 948 (6%)

2057 (12%)

228 (14%)

89 (20%)

  T1

12 485 (6%)

2205 (12%)

252 (15%)

96 (22%)

  T5

10 066 (8%)

1802 (17%)

256 (20%)

99 (29%)

Subjects with ≥ 270 mean annual days on DP

  -T5

6929 (4%)

1160 (7%)

100 (6%)

42 (10%)

  -T1

8939 (4%)

1529 (9%)

158 (10%)

57 (13%)

  T0

9400 (5%)

1616 (9%)

169 (10%)

62 (14%)

  T1

9855 (5%)

1748 (10%)

193 (12%)

66 (15%)

  T5

7813 (7%)

1422 (14%)

198 (15%)

77 (23%)

Mean annual net days DP (-T5 to T5)

  Men

15.3 days

27.9 days

39.5 days

53.8 days

  Women

22.8 days

44.6 days

49.5 days

70.6 days