Table 3.

Results of subgroup analysis

Subgroup	GM rotation/GM department	N	Estimated Coefficient	SE	P-value
Urban area	no/no	533	0
	no/yes	1283	0.9997	0.656	0.1277
	yes/yes	1197	1.3449	0.6458	0.0374
Rural area	no/no	1323	0
	no/yes	3641	0.9057	0.3448	0.0086
	yes/yes	3267	1.1051	0.3435	0.0013
Community hospital	no/no	1831	0
	no/yes	4150	0.9369	0.3121	0.0027
	yes/yes	4009	1.0941	0.3098	0.0004
University Hospital	no/no	25	0
	no/yes	774	2.9894	2.2138	0.1773
	yes/yes	455	3.6334	2.1959	0.0984
Male	no/no	1242	0
	no/yes	3294	0.7854	0.3533	0.0263
	yes/yes	3075	1.1612	0.3513	0.001
Female	no/no	614	0
	no/yes	1630	0.9223	0.4261	0.0305
	yes/yes	1389	1.206	0.4308	0.0052
Deviation value <= 65.0	no/no	892	0
	no/yes	2570	0.7941	0.3787	0.036
	yes/yes	2413	1.0696	0.3765	0.0045
Deviation value > = 65.1	no/no	964	0
	no/yes	2354	0.9123	0.4119	0.0269
	yes/yes	2051	1.2676	0.4137	0.0022
ED duty: 0 per month	no/no	40	0
	no/yes	180	0.9343	1.3604	0.4935
	yes/yes	127	−0.04607	1.3895	0.9736
ED duty: 1 to 2 per month	no/no	155	0
	no/yes	878	1.2616	0.8098	0.1196
	yes/yes	510	1.6789	0.8348	0.0446
ED duty: 3 to 5 per month	no/no	1446	0
	no/yes	3235	0.8094	0.3388	0.0169
	yes/yes	3098	1.097	0.3371	0.0011
ED duty: more than 6 per month	no/no	205	0
	no/yes	575	0.629	0.7102	0.376
	yes/yes	693	1.4192	0.7069	0.045
Average number of inpatients in charge: 0 to 4	no/no	310	0
	no/yes	784	1.0523	0.5967	0.0781
	yes/yes	682	0.8281	0.6093	0.1744
Average number of inpatients in charge: 5 to 9	no/no	1081	0
	no/yes	2947	0.9504	0.3662	0.0095
	yes/yes	2622	1.3387	0.3648	0.0002
Average number of inpatients in charge: 10 to 14	no/no	317	0
	no/yes	770	0.01113	0.6356	0.986
	yes/yes	725	0.8508	0.6402	0.1842
Average number of inpatients in charge: more than 15	no/no	60	0
	no/yes	245	−0.02175	1.1874	0.9854
	yes/yes	310	0.1001	1.1793	0.9324
UpToDate non-user	no/no	1047	0
	no/yes	2688	0.7996	0.312	0.0104
	yes/yes	1948	0.8833	0.3143	0.005
UpToDate user	no/no	269	0
	no/yes	816	1.048	0.576	0.069
	yes/yes	1077	1.9872	0.5635	0.0004
Study time: none	no/no	98	0
	no/yes	308	0.9609	0.9799	0.3277
	yes/yes	249	−0.1344	1.0034	0.8936
Study time: 0 to 30 min	no/no	591	0
	no/yes	1864	1.1565	0.4112	0.0049
	yes/yes	1567	1.5432	0.4161	0.0002
Study time: 31 to 60 min	no/no	820	0
	no/yes	1875	0.6662	0.4023	0.0979
	yes/yes	1762	1.4065	0.4027	0.0005
Study time: 61 to 90 min	no/no	265	0
	no/yes	663	0.2159	0.6385	0.7354
	yes/yes	672	0.8812	0.6487	0.1748
Study time: more than 91 min	no/no	73	0
	no/yes	180	0.3576	1.3614	0.7935
	yes/yes	198	0.9663	1.3499	0.4761

ED emergency department

Each multilevel regression analysis adjusted for variables indicated in Table 2