Investigating the effectiveness of peer code review in distributed software development based on objective and subjective data

Journal of Software Engineering Research and Development

Table 4 Outcomes by patch size (LOC)

LOC	#Rev	DUR		PART		CD _G		CD _R
		M	SD	M	SD	M	SD	M	SD
0–20	3836	1.8	6.6	86.1	22.3	99.3	139.6	47.3	60.6
21–40	716	3.9	13.0	81.7	22.7	15.3	15.4	5.7	4.1
41–60	475	4.4	10.2	78.4	24.0	9.4	8.4	3.5	2.2
61–80	342	5.0	10.3	79.5	22.4	7.8	6.8	2.7	1.6
81–100	273	5.8	16.0	74.9	24.0	5.4	4.3	2.0	1.2
101–200	762	6.0	12.9	75.2	23.8	4.3	3.7	1.5	0.9
201–400	688	8.0	16.8	73.7	23.7	2.6	2.5	0.9	0.7
401–600	371	9.4	16.0	71.9	22.3	1.5	1.5	0.5	0.3
601–800	203	10.4	16.7	71.2	23.1	1.3	1.5	0.4	0.3
801–1000	158	10.0	15.7	69.4	24.6	1.0	0.9	0.3	0.2
1001–2000	282	13.4	19.1	66.9	23.2	0.8	0.8	0.2	0.2
2001–3000	78	15.1	18.9	62.0	24.7	0.4	0.3	0.1	0.1
> 3000	145	12.7	17.0	67.1	24.5	0.2	0.2	0.1	0.1
Total	8329	4.7	12.1	80.1	23.8	48.8	105.8	22.9	46.9