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| 1976-1990 (n=2652) | 1991-2000 (n=2198) | 2001-2008 (n=2609) | P value | ||
|---|---|---|---|---|---|
| Cholecystectomy | Overall | 215 (207-224) | 202 (193-210) | 251 (241-261) | <0.01 |
| Men | 176 (163-188) | 128 (118-139) | 156 (144-167) | 0.64 | |
| Woman | 258 (246-271) | 276 (263-290) | 347 (331-363) | <0.01 |
