Table 1 Baseline characteristics for the total study population, and for high and low GFI and FI groups

Age, mean (SD)

73.4 (9.2)

70.9 (8.2)

77.3 (9.4)

< 0.001^b

68.7 (7.6)

76.6 (8.9)

< 0.001^b

Females, n (%)

337 (52.8)

195 (50.3)

142 (56.8)

0.11^c

138 (54.1)

199 (52)

0.59^c

Frailty index score, mean (SD)

0.11 (0.08)

0.08 (0.06)

0.15 (0.08)

< 0.001^b

0.03 (0.02)

0.15 (0.07)

< 0.001^b

Consultation gap in days, mean (SD)

114 (347)

152 (436)

55 (81)

0.001^b

203 (531)

55 (67.0)

< 0.001^b

Dutch nationality, n (%)

604 (94.7)

370 (95.4)

234 (93.6)

0.33^c

244 (95.7)

360 (94.0)

0.35^c

Social situation

Living alone, n (%)

56 (8.8)

28 (7.2)

28 (11.2)

0.083^c

23 (9.0)

33 (8.6)

0.86^c

Living with a partner, n (%)

370 (58.0)

270 (69.6)

100 (40.0)

< 0.001^c

176 (69.0)

194 (50.7)

< 0.001^c

Living alone as a widower or after divorce, n (%)

207 (32.4)

89 (22.9)

118 (47.2)

< 0.001^c

54 (21.2)

153 (39.9)

< 0.001^c

Missing, n (%)

5 (0.8)

1 (0.3)

4 (1.6)

0.061^c

2 (0.8)

3 (0.8)

1.0^c

Education (highest finished education)

None or primary school, n (%)

103 (16.1)

48 (12.4)

55 (22.0)

0.001^c

32 (12.5)

71 (18.5)

0.044^c

Secondary school, n (%)

348 (54.5)

208 (53.6)

140 (56.0)

0.55^c

128 (50.2)

220 (57.4)

0.072^c

Higher education, n (%)

181 (28.4)

129 (33.2)

52 (20.8)

0.001^c

92 (36.1)

89 (23.2)

< 0.001^c

Missing, n (%)

5 (0.8)

3 (0.8)

3 (1.2)

0.97^c

3 (1.2)

3 (0.8)

0.36^c

GFI score, mean (SD)

3.2 (2.8)^a

1.4 (1.1)

6.2 (2.0)

< 0.001^b

1.8 (1.9)

4.2 (2.8)

< 0.001^b

GFI score ≥ 4, n (%)

250 (39.2%)

-

-

-

39 (15.3)

211 (55.1)

< 0.001^c