Table 5.

Pair-specific age- and sex-adjusted hazard ratios for stages of implant introduction ^a

A	B	C	D	E	F
1	1–15	2.5 (1.5–4.1)	1.2 (0.5–2.7)	1.1 (0.5–2.6)	2.6 (1.6–4.2)
	16–30	2.2 (1.3–3.7)	1.7 (0.9–3.3)	1.7 (0.8–3.3)	2.3 (1.4–3.8)
	31–50	1.7 (1.0–2.8)	2.1 (1.2–3.5)	2.2 (1.3–3.7)	1.5 (0.9–2.7)
	51–100	1.5 (0.9–2.3)	1.4 (0.9–2.3)	1.3 (0.8–2.2)	1.5 (1.0–2.4)
	100–	1.0	1.0	1.0	1.0
2	1–15	1.9 (0.9–3.7)	2.1 (1.1–4.2)	2.1 (1.0–4.1)	1.9 (1.0–3.8)
	16–30	1.0 (0.4–2.7)	1.2 (0.5–3.1)	1.1 (0.4–3.0)	1.1 (0.4–2.8)
	31–50	1.2 (0.5–2.8)	1.1 (0.4–2.8)	1.0 (0.4–2.7)	1.2 (0.5–3.0)
	51–100	1.4 (0.7–2.9)	1.7 (0.9–3.3)	1.6 (0.8–3.1)	1.5 (0.8–3.0)
	100–	1.0	1.0	1.0	1.0
4	1–15	0.7 (0.4–1.4)			0.7 (0.4–1.4)
	16–30	0.6 (0.3–1.4)			0.6 (0.3–1.5)
	31–50	0.7 (0.4–1.5)			0.6 (0.3–1.3)
	51–100	0.8 (0.4–1.4)			0.8 (0.5–1.5)
	100–	1.0			1.0
6	1–15	0.9 (0.5–1.9)		0.8 (0.4–1.7)
	16–30	0.7 (0.3–1.6)		0.7 (0.3–1.5)
	31–50	0.5 (0.2–1.2)		0.3 (0.1–0.9)
	51–100	0.7 (0.4–1.4)		0.8 (0.4–1.5)
	100–	1.0		1.0
7	1–15	2.0 (0.8–5.4)	2.5 (1.0–6.7)	2.7 (1.1–6.5)	1.9 (0.7–5.2)
	16–30	1.3 (0.4–3.8)	1.2 (0.3–4.1)	1.2 (0.3–4.3)	1.2 (0.4–3.5)
	31–50	1.4 (0.5–3.8)	1.1 (0.3–4.0)	0.7 (0.2–3.2)	1.6 (0.6–4.2)
	51–100	1.1 (0.4–2.7)	1.9 (0.9–4.1)	2.0 (0.9–4.4)	1.0 (0.4–2.4)
	100–	1.0	1.0	1.0	1.0
9	1–15	1.7 (0.7–4.0)			1.7 (0.7–4.0
	16–30	1.5 (0.6–3.8)			1.5 (0.6–3.8)
	31–50	1.2 (0.5–3.1)			1.2 (0.5–3.1)
	51–100	0.7 (0.2–1.9)			0.7 (0.2–1.9)
	100–	1.0			1.0
10	1–15	0.5 (0.2–1.5)			0.5 (0.2–1.5)
	16–30	0.9 (0.3–2.4)			0.9 (0.3–2.4)
	31–50	0.7 (0.3–2.1)			0.7 (0.3–2.1)
	51–100	0.9 (0.3–2.1)			0.9 (0.3–2.1)
	100–	1.0			1.0

^a Due to small number of observations in all numbering groups, the pairs 3, 5, and 8 have been excluded from the pairwise analysis.

A Pair

B Order no. of the operation

C Order numbering, minimum, HR (95% CI)

D Order numbering, maximum, HR (95% CI)

E Order numbering, stem, HR (95% CI)

F Order numbering, cup, HR (95% CI)