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Table 7 Estimates of ORSCL and ORMH (95% CI), and ORG (2.5–97.5pct): Australian data on SSRI-hip fracture (Study period = 180 days, Exposure Definition I)

From: A novel weighting method to remove bias from within-subject exposure dependency in case-crossover studies

Study period

180 days

Days in 1 period

1 day

5 days

20 days

30 days

60 days

90 days

M

179

35

8

5

2

1

ORSCL

2.02 (1.71–2.37)

1.85 (1.58–2.17)

1.76 (1.49–2.06)

1.72 (1.46–2.02)

1.59 (1.33–1.91)

1.51 (1.24–1.83)

ORMH

1.67 (1.46–1.92)

1.60 (1.39–1.84)

1.59 (1.37–1.84)

1.61 (1.38–1.88)

1.55 (1.30–1.85)

1.51 (1.24–1.83)

ORG

1.67 (1.49–1.90)

1.60 (1.40–1.83)

1.59 (1.39–1.83)

1.61 (1.41–1.87)

1.55 (1.30–1.81)

1.51 (1.24–1.85)

  1. M is the number of control periods
  2. ORSCL: odds ratio by the standard conditional logistic regression; ORMH: odds ratio by the Mantel-Haenszel method; ORG: odds ratio by the Greenland’s method; 95%CI: 95% confidence interval; 2.5–97.5pct: 2.5 to 97.5 percentiles